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    Clinical Trial Results:
    A Phase 2 Randomized, Double-Blinded, Placebo-Controlled Study to Evaluate the Effects of Multiple Subcutaneous Injections of Elamipretide on Left Ventricular Function in Subjects with Stable Heart Failure with Reduced Ejection Fraction

    Summary
    EudraCT number
    2014-005724-10
    Trial protocol
    NL   GB   IT  
    Global end of trial date
    12 Oct 2017

    Results information
    Results version number
    v1(current)
    This version publication date
    04 Oct 2019
    First version publication date
    04 Oct 2019
    Other versions
    Summary report(s)
    Synopsis

    Trial information

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    Trial identification
    Sponsor protocol code
    SPIHF-201
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    -
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    Stealth BioTherapeutics Inc
    Sponsor organisation address
    275 Grove Street, Newton, United States, MA 02466
    Public contact
    Julia Morteo, Stealth BioTherapeutics Inc., 1 0016174314216, julia.morteo@stealthbt.com
    Scientific contact
    Julia Morteo, Stealth BioTherapeutics Inc., 1 0016174314216, julia.morteo@stealthbt.com
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    No
    Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    16 May 2019
    Is this the analysis of the primary completion data?
    Yes
    Primary completion date
    12 Oct 2017
    Global end of trial reached?
    Yes
    Global end of trial date
    12 Oct 2017
    Was the trial ended prematurely?
    No
    General information about the trial
    Main objective of the trial
    To evaluate the effects of multiple subcutaneous (SC) doses of elamipretide on left ventricular end systolic volume (LV ESV) assessed by cardiac Magnetic Resonance Imaging (MRI)
    Protection of trial subjects
    The Declaration of Helsinki, Patient Informed Consent, International Council for Harmonisation guideline on Good Clinical Practice (ICH-GCP).
    Background therapy
    Heart failure (HF) treatment, including, but not limited to, angiotensin converting enzyme inhibitors (ACEI) and/or angiotensin receptor blockers (ARB), and an evidence-based beta blocker for the treatment of HF. Subjects who could not tolerate ACEI or ARB due to reduced renal function or hypotension were eligible. Subjects could be receiving aldosterone antagonists, but this was not a requirement for the study.
    Evidence for comparator
    -
    Actual start date of recruitment
    20 Jun 2016
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    No
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    Netherlands: 27
    Country: Number of subjects enrolled
    United Kingdom: 3
    Country: Number of subjects enrolled
    Italy: 41
    Worldwide total number of subjects
    71
    EEA total number of subjects
    71
    Number of subjects enrolled per age group
    In utero
    0
    Preterm newborn - gestational age < 37 wk
    0
    Newborns (0-27 days)
    0
    Infants and toddlers (28 days-23 months)
    0
    Children (2-11 years)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    34
    From 65 to 84 years
    37
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    Subjects were recruited at 15 sites in 3 countries (Italy, The Netherlands, and United Kingdom), with 14 sites consenting at least 1 subject.

    Pre-assignment
    Screening details
    Subjects ≥40 and <80 years with known history of chronic ischemic or non-ischemic cardiomyopathy of at least 6 months duration or signs and symptoms consistent with stable heart failure (HF) receiving HF treatment (stable doses ≥1 month, with normal sinus rhythm, and left ventricular ejection fraction (LVEF) ≤40% by 2-D echocardiography.

    Period 1
    Period 1 title
    Screening
    Is this the baseline period?
    No
    Allocation method
    Not applicable
    Blinding used
    Not blinded

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Placebo
    Arm description
    Not applicable
    Arm type
    Placebo

    Investigational medicinal product name
    Placebo
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Not applicable

    Arm title
    4 mg elamipretide
    Arm description
    Not applicable
    Arm type
    Experimental

    Investigational medicinal product name
    Elamipretide
    Investigational medicinal product code
    Other name
    MTP-131
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Not applicable

    Arm title
    40 mg elamipretide
    Arm description
    Not applicable
    Arm type
    Experimental

    Investigational medicinal product name
    Elamipretide
    Investigational medicinal product code
    Other name
    MTP-131
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Not applicable

    Number of subjects in period 1
    Placebo 4 mg elamipretide 40 mg elamipretide
    Started
    24
    22
    25
    Completed
    24
    22
    25
    Period 2
    Period 2 title
    Treatment
    Is this the baseline period?
    Yes [1]
    Allocation method
    Randomised - controlled
    Blinding used
    Double blind
    Roles blinded
    Subject, Investigator, Monitor, Data analyst, Carer, Assessor
    Blinding implementation details
    At Day 1, after the eligibility criteria was confirmed, a treatment kit number was assigned to each subject based on a centralized computer generated randomization schedule administered by Interactive web-based response system (IWRS). Subjects were randomized into 1 of 3 treatment groups in a 1:1:1 fashion to receive either elamipretide 4 mg, elamipretide 40 mg, or placebo.

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Placebo
    Arm description
    The placebo for this study was provided as a sterile solution in matching sterile glass vials, which was composed of the excipients used to manufacture the IMP elamipretide without the active drug substance. The placebo was handled and administered identically as active drug. Subjects randomized to placebo received an injection containing either 1 mL or 0.1 mL of sterile solution to match the two volumes administered in the active arm.
    Arm type
    Placebo

    Investigational medicinal product name
    Placebo
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Subjects randomized to placebo received an injection containing either 1 mL or 0.1 mL of sterile solution to match the two volumes administered in the active arm.

    Arm title
    4 mg elamipretide
    Arm description
    0.1 of elamipretide 40 mg/ml via single daily subcutaneous injection
    Arm type
    Experimental

    Investigational medicinal product name
    Elamipretide
    Investigational medicinal product code
    Other name
    MTP-131
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    A single daily subcutaneous injection containing 0.1 mL of elamipretide 40 mg/ml.

    Arm title
    40 mg elamipretide
    Arm description
    1 ml of elamipretide 40 mg/ml via single daily subcutaneous injection
    Arm type
    Experimental

    Investigational medicinal product name
    Elamipretide
    Investigational medicinal product code
    Other name
    MTP-131
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    A single daily subcutaneous injection containing 1 ml of elamipretide 40 mg/ml

    Notes
    [1] - Period 1 is not the baseline period. It is expected that period 1 will be the baseline period.
    Justification: Day 1 (part of Period 2) was used for the baseline calculations.
    Number of subjects in period 2
    Placebo 4 mg elamipretide 40 mg elamipretide
    Started
    24
    22
    25
    Completed
    24
    22
    25
    Period 3
    Period 3 title
    Follow-up
    Is this the baseline period?
    No
    Allocation method
    Randomised - controlled
    Blinding used
    Double blind
    Roles blinded
    Subject, Investigator, Monitor, Data analyst, Carer, Assessor

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Placebo
    Arm description
    Not applicable
    Arm type
    Placebo

    Investigational medicinal product name
    Placebo
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Not applicable

    Arm title
    4 mg elamipretide
    Arm description
    Not applicable
    Arm type
    Experimental

    Investigational medicinal product name
    Elamipretide
    Investigational medicinal product code
    Other name
    MTP-131
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Not applicable

    Arm title
    40 mg elamipretide
    Arm description
    Not applicable
    Arm type
    Experimental

    Investigational medicinal product name
    Elamipretide
    Investigational medicinal product code
    Other name
    MTP-131
    Pharmaceutical forms
    Solution for injection
    Routes of administration
    Subcutaneous use
    Dosage and administration details
    Not applicable

    Number of subjects in period 3
    Placebo 4 mg elamipretide 40 mg elamipretide
    Started
    24
    22
    25
    Completed
    24
    22
    25

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Treatment
    Reporting group description
    Overall, 54 subjects (76.1%) were male and 17 subjects (23.9%) were female; the ratio of male to female subjects was different in all treatment groups. All subjects in the study were White and 37 subjects (52.1%) were ≥ 65 years of age. Mean (SD) age was 64.8 years (9.83) years and mean (SD) weight was 86.72 (18.97) kg

    Reporting group values
    Treatment Total
    Number of subjects
    71 71
    Age categorical
    Units: Subjects
        In utero
    0 0
        Preterm newborn infants (gestational age < 37 wks)
    0 0
        Newborns (0-27 days)
    0 0
        Infants and toddlers (28 days-23 months)
    0 0
        Children (2-11 years)
    0 0
        Adolescents (12-17 years)
    0 0
        Adults (18-64 years)
    34 34
        From 65-84 years
    37 37
        85 years and over
    0 0
    Age continuous
    Units: years
        arithmetic mean (standard deviation)
    64.8 ± 9.83 -
    Gender categorical
    Units: Subjects
        Female
    17 17
        Male
    54 54

    End points

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    End points reporting groups
    Reporting group title
    Placebo
    Reporting group description
    Not applicable

    Reporting group title
    4 mg elamipretide
    Reporting group description
    Not applicable

    Reporting group title
    40 mg elamipretide
    Reporting group description
    Not applicable
    Reporting group title
    Placebo
    Reporting group description
    The placebo for this study was provided as a sterile solution in matching sterile glass vials, which was composed of the excipients used to manufacture the IMP elamipretide without the active drug substance. The placebo was handled and administered identically as active drug. Subjects randomized to placebo received an injection containing either 1 mL or 0.1 mL of sterile solution to match the two volumes administered in the active arm.

    Reporting group title
    4 mg elamipretide
    Reporting group description
    0.1 of elamipretide 40 mg/ml via single daily subcutaneous injection

    Reporting group title
    40 mg elamipretide
    Reporting group description
    1 ml of elamipretide 40 mg/ml via single daily subcutaneous injection
    Reporting group title
    Placebo
    Reporting group description
    Not applicable

    Reporting group title
    4 mg elamipretide
    Reporting group description
    Not applicable

    Reporting group title
    40 mg elamipretide
    Reporting group description
    Not applicable

    Primary: Change from Baseline in Left Ventricular End Systolic Volume assessed by cardiac Magnetic Resonance Imaging (MRI)

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    End point title
    Change from Baseline in Left Ventricular End Systolic Volume assessed by cardiac Magnetic Resonance Imaging (MRI)
    End point description
    End point type
    Primary
    End point timeframe
    4 weeks
    End point values
    Placebo 4 mg elamipretide 40 mg elamipretide
    Number of subjects analysed
    23
    22
    24
    Units: mL
        arithmetic mean (standard deviation)
    -3.8 ± 5.85
    -4.4 ± 6.50
    -1.2 ± 9.04
    Statistical analysis title
    ITT set analysis for efficacy assessment
    Comparison groups
    Placebo v 4 mg elamipretide v 40 mg elamipretide
    Number of subjects included in analysis
    69
    Analysis specification
    Pre-specified
    Analysis type
    other
    P-value
    ≤ 0.05
    Method
    2-sided, Hochberg's adjustment
    Confidence interval

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    20 June 2016 - 12 October 2017
    Adverse event reporting additional description
    Treatment emergent adverse events (TEAEs)
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    20.1
    Reporting groups
    Reporting group title
    Placebo
    Reporting group description
    -

    Reporting group title
    4 mg elamipretide
    Reporting group description
    -

    Reporting group title
    40 mg elamipretide
    Reporting group description
    -

    Serious adverse events
    Placebo 4 mg elamipretide 40 mg elamipretide
    Total subjects affected by serious adverse events
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         number of deaths (all causes)
    0
    0
    0
         number of deaths resulting from adverse events
    0
    0
    0
    Nervous system disorders
    Vestibular disorder
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 2%
    Non-serious adverse events
    Placebo 4 mg elamipretide 40 mg elamipretide
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    8 / 24 (33.33%)
    4 / 22 (18.18%)
    12 / 25 (48.00%)
    Investigations
    Blood bilirubin increased
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Eosinophil count increased
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Troponin T increased
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    0 / 25 (0.00%)
         occurrences all number
    1
    0
    0
    Vascular disorders
    Deep vein thrombosis
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Hypertension
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Hypotension
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    0 / 25 (0.00%)
         occurrences all number
    1
    0
    0
    Nervous system disorders
    Dizziness
         subjects affected / exposed
    1 / 24 (4.17%)
    1 / 22 (4.55%)
    1 / 25 (4.00%)
         occurrences all number
    1
    1
    1
    Headache
         subjects affected / exposed
    0 / 24 (0.00%)
    1 / 22 (4.55%)
    0 / 25 (0.00%)
         occurrences all number
    0
    1
    0
    Sciatica
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Somnolence
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    0 / 25 (0.00%)
         occurrences all number
    1
    0
    0
    General disorders and administration site conditions
    Fatigue
         subjects affected / exposed
    1 / 24 (4.17%)
    2 / 22 (9.09%)
    1 / 25 (4.00%)
         occurrences all number
    1
    2
    1
    Injection site erythema
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Injection site haemorrhage
         subjects affected / exposed
    0 / 24 (0.00%)
    1 / 22 (4.55%)
    0 / 25 (0.00%)
         occurrences all number
    0
    1
    0
    Injection site induration
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Injection site mass
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Injection site pain
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Oedema peripheral
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Pyrexia
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Gastrointestinal disorders
    Constipation
         subjects affected / exposed
    0 / 24 (0.00%)
    1 / 22 (4.55%)
    0 / 25 (0.00%)
         occurrences all number
    0
    1
    0
    Diarrhoea
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    1
    0
    1
    Nausea
         subjects affected / exposed
    1 / 24 (4.17%)
    1 / 22 (4.55%)
    0 / 25 (0.00%)
         occurrences all number
    1
    1
    0
    Respiratory, thoracic and mediastinal disorders
    Dyspnoea
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    0 / 25 (0.00%)
         occurrences all number
    1
    0
    0
    Oropharyngeal pain
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Productive cough
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    0 / 25 (0.00%)
         occurrences all number
    1
    0
    0
    Psychiatric disorders
    Insomnia
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    1
    0
    1
    Anxiety
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    0 / 25 (0.00%)
         occurrences all number
    1
    0
    0
    Renal and urinary disorders
    Albuminuria
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    0 / 25 (0.00%)
         occurrences all number
    1
    0
    0
    Haematuria
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    0 / 25 (0.00%)
         occurrences all number
    1
    0
    0
    Renal impairment
         subjects affected / exposed
    0 / 24 (0.00%)
    1 / 22 (4.55%)
    0 / 25 (0.00%)
         occurrences all number
    0
    1
    0
    Musculoskeletal and connective tissue disorders
    Arthralgia
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Musculoskeletal pain
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Pain in extremity
         subjects affected / exposed
    0 / 24 (0.00%)
    1 / 22 (4.55%)
    0 / 25 (0.00%)
         occurrences all number
    0
    1
    0
    Infections and infestations
    Nasopharyngitis
         subjects affected / exposed
    1 / 24 (4.17%)
    1 / 22 (4.55%)
    2 / 25 (8.00%)
         occurrences all number
    1
    1
    2
    Gastroenteritis viral
         subjects affected / exposed
    0 / 24 (0.00%)
    1 / 22 (4.55%)
    0 / 25 (0.00%)
         occurrences all number
    0
    1
    0
    Respiratory tract infection
         subjects affected / exposed
    0 / 24 (0.00%)
    1 / 22 (4.55%)
    0 / 25 (0.00%)
         occurrences all number
    0
    1
    0
    Upper respiratory tract infection
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Metabolism and nutrition disorders
    Diabetes mellitus
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Gout
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1
    Hyperkalaemia
         subjects affected / exposed
    1 / 24 (4.17%)
    0 / 22 (0.00%)
    0 / 25 (0.00%)
         occurrences all number
    1
    0
    0
    Hypokalaemia
         subjects affected / exposed
    0 / 24 (0.00%)
    0 / 22 (0.00%)
    1 / 25 (4.00%)
         occurrences all number
    0
    0
    1

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    15 Jul 2016
    Hyponatremia defined as sodium (Na+) level <125 mEq/L (This change was made and submitted only for UK)
    01 Dec 2016
    • Inclusion criteria for known history of chronic ischemic or non-ischemic cardiomyopathy of at least 6 months duration from the time of the initial diagnosis was updated to include addition of signs and symptoms consistent with heart failure. • Inclusion criteria for LVEF was changed from ≤35% to ≤40% by 2-D echocardiography at Screening. • Exclusion criteria for subjects receiving treatment with therapeutic doses of anticoagulants was updated to include Vitamin K antagonists as well. • Exploratory endpoints was updated to include change in Borg dyspnea scale. • Week 1 visit was updated that on Days 1 through 3, subjects had to return to the site for the administration of IMP as well as the assessment of ISRs. • Respiratory rate recording was included for the tests to be done before and after the 6MWT.
    21 Mar 2017
    • Methodology section was updated to include 70 subjects (at least 22 subjects in each group) for randomization, in 1:1:1 ratio, to receive either placebo, 4 mg elamipretide, or 40 mg elamipretide once daily for 28 consecutive days. • The number of subjects to be randomized was increased from 45 subjects to 70 subjects. As the initial sample size of 45 subjects was based on the assumption that a sample size of 15 subjects per treatment group provided 90% power to detect 8 mL difference between treatment groups in LV ESV, as measured by MRI, assuming a SD of 6.5 mL. A revised estimate of the SD, based on a review of blinded LV ESV data from the first 11 subjects who completed treatment, suggested it may ultimately be as high as 9.4 mL. Accordingly, the sample size was increased to around 22 subjects per treatment group, which provided 80% power to detect the aforementioned 8 mL difference between treatment groups.

    Interruptions (globally)

    Were there any global interruptions to the trial? No

    Limitations and caveats

    Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data.
    None reported
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