| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Relapsed or refractory diffuse large B-cell lymphoma(DLBCL) |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| Relapsed or refractory diffuse large B-cell lymphoma(DLBCL) |  | 
| E.1.1.2 | Therapeutic area | Diseases [C] - Cancer [C04] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| 
| E.1.2 | Version | 17.0 |  
| E.1.2 | Level | PT |  
| E.1.2 | Classification code | 10012818 |  
| E.1.2 | Term | Diffuse large B-cell lymphoma |  
| E.1.2 | System Organ Class | 10029104 - Neoplasms benign, malignant and unspecified (incl cysts and polyps) |  | 
| E.1.3 | Condition being studied is a rare disease | Yes | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| Determine if MEDI-551, when used in combination with salvage chemotherapy, Ifosafamide-carboplatin-etoposide (ICE) or Dexamethasone-cytarabine (DHAP) in patients with relapsed or refractory DLBCL who are eligible for Autologous Sem Cell Tansplant (ASCT), has superior efficacy compared to rituximab in the same population. 
 |  | 
| E.2.2 | Secondary objectives of the trial | 
| Evaluate anti-tumor activities and overall survival (OS),to determine an acceptable dose for MEDI-551 when used in combination with ICE or DHAP, to describe the safety and tolerability, to determine the immunogenicity (IM), and to describe the pharmacokinetic  (PK) profile. |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| • Histologically confirmed aggressive B-cell DLBCL, including FL transforming to DLBCL & Grade III FL • Relapsed from or refractory to at least one treatment containing rituximab or another anti-CD20 based immunotherapy combined with anthracycline- or anthracenedione-based chemotherapy
 • Eligible for ASCT
 • Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1, or 2
 • Life expectancy of ≥ 12 weeks
 • Adequate hematological function
 |  | 
| E.4 | Principal exclusion criteria | 
| • Any chemotherapy, radiotherapy, immunotherapy, biologic, investigational or hormonal therapy for treatment of lymphoma within 28 days prior to treatment • Previous cancer therapy for DLBCL other than anthracycline- or anthracenedione based chemoimmunotherapy, monotherapy rituximab prior to first line therapy and/or as a maintenance therapy, or limited field radiotherapy
 • Prior autologous or allogeneic SCT
 • New York Heart Association ≥ Class II congestive heart failure;
 • Clinically significant abnormality on ECG
 • History of other invasive malignancy within 5 years except for localized/in situ, carcinomas such as cervical carcinoma in situ.
 • Evidence of active infection
 • Documented current central nervous system involvement by leukemia or lymphoma
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The overall response rate (ORR), including Partial Response (PR) and Complete Response (CR), of subjects treated with MEDI-551 when used in combination with ICE or DHAP versus rituximab in combination with ICE or DHAP in subjects with relapsed or refractory DLBCL. |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point |  | 
| E.5.2 | Secondary end point(s) | 
| Antitumor activity: Includes complete response rate, Minimal residual disease negative complete response rate, time to response (TTR), time to progression (TTP), progression-free survival (PFS), and overall survival (OS) 
 Acceptable Dose: Benefit/Risk Analysis of Safety and Efficacy to be determined
 
 Safety and Tolerability: The safety endpoints include Adverse Events (AEs), Serious Adverse Events (SAEs) occurring during the protocol-specified reporting period and changes in clinical laboratory evaluations, Electrocardiogram (ECGs), vital signs, and weight from baseline.
 
 Immunogenicity (IM): Number and percentage of subjects who develop detectable anti-drug antibodies
 
 Pharmacokinetics (PK): Area Under Curve, CMAX, T1-half
 
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| Antitumor activity:  Study Day 1080 Acceptable dose:  Study Day 42
 Safety and Tolerability: Study Day 1080
 IM: Up to Study Day 1080
 PK: Study Day 1; Study Day 8; Study Day 12; Study Day 19; Study Day 26; Study Day 54; Study Day 110; Study Day 138; Study Day 166
 |  | 
| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis | No | 
| E.6.2 | Prophylaxis | No | 
| E.6.3 | Therapy | Yes | 
| E.6.4 | Safety | Yes | 
| E.6.5 | Efficacy | Yes | 
| E.6.6 | Pharmacokinetic | Yes | 
| E.6.7 | Pharmacodynamic | Yes | 
| E.6.8 | Bioequivalence | No | 
| E.6.9 | Dose response | No | 
| E.6.10 | Pharmacogenetic | No | 
| E.6.11 | Pharmacogenomic | No | 
| E.6.12 | Pharmacoeconomic | No | 
| E.6.13 | Others | No | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) | No | 
| E.7.1.1 | First administration to humans | No | 
| E.7.1.2 | Bioequivalence study | No | 
| E.7.1.3 | Other | No | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) | Yes | 
| E.7.3 | Therapeutic confirmatory (Phase III) | No | 
| E.7.4 | Therapeutic use (Phase IV) | No | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | Yes | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | No | 
| E.8.1.5 | Parallel group | Yes | 
| E.8.1.6 | Cross over | No | 
| E.8.1.7 | Other | No | 
| E.8.2 | Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) | Yes | 
| E.8.2.2 | Placebo | No | 
| E.8.2.3 | Other | Yes | 
| E.8.2.3.1 | Comparator description |  | 
| E.8.2.4 | Number of treatment arms in the trial | 3 | 
| E.8.3 | The trial involves single site in the Member State concerned | No | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | Yes | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 4 | 
| E.8.5 | The trial involves multiple Member States | Yes | 
| E.8.5.1 | Number of sites anticipated in the EEA | 46 | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | Yes | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.6.3 | If E.8.6.1 or E.8.6.2 are Yes, specify the regions in which trial sites are planned | 
| Canada |  
| Czech Republic |  
| France |  
| Germany |  
| Hungary |  
| Israel |  
| Italy |  
| Japan |  
| Poland |  
| Russian Federation |  
| Spain |  
| United States |  | 
| E.8.7 | Trial has a data monitoring committee | Yes | 
| E.8.8 | Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial | 
| The end of the study (“study completion”) is defined as the date of the last protocol-specified visit/assessment (including telephone contact) in the study. This date will be after a total of 90 deaths occur in the selected MEDI-551 dose arm and the rituximab arm or 36 months after the date of randomization for the last subject, or the date the sponsor stops the trial, whichever occurs first. |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 4 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days | 0 | 
| E.8.9.2 | In all countries concerned by the trial years | 4 | 
| E.8.9.2 | In all countries concerned by the trial months | 6 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |