| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated | 
| Influence of aromatase inhibitors on insulin sensitivity, liver and hart function in obese men |  | 
| E.1.1.1 | Medical condition in easily understood language | 
| obesity insulun sensitivity, liver and heart function
 sex steroids
 |  | 
| E.1.1.2 | Therapeutic area | Body processes [G] - Metabolic Phenomena [G03] | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease | No | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial | 
| The primary objective of the study is to evaluate potential effects and causes of changed sex steroids in obese men |  | 
| E.2.2 | Secondary objectives of the trial | 
| Does a change of the sex steroid environment in obese men have an impact on liver and heart function? Is there a direct (independent of body weight) influence on insulin sensitivity? |  | 
| E.2.3 | Trial contains a sub-study | No | 
| E.3 | Principal inclusion criteria | 
| All criteria should be met 1)	Informed consent obtained.
 2)	Obese male subjects planned for gastric bypass with low testosterone levels
 3)	Age 20 - 65 , BMI > 30 kg/m²
 
 |  | 
| E.4 | Principal exclusion criteria | 
| - Primary hypogonadism or secondary hypogonadism due to genetic causes (Kallman syndrome etc.), tumours, infiltrative diseases, infections, pituitary apoplexy, trauma, critical illness, chronic systemic illness or intentional. - Treatment with corticoids, opiates (on a daily basis), androgen- or estrogen analogs or CYP2A6 substrates (Dexmedetomidine, Ifosfamide, Methoxsalen, Miconazole, Tranylcypromine).
 - Impaired renal function defined as serum-creatine > 1.5 mg/dL
 - Impaired liver function, defined as ALAT > 2.5 times upper limit of normal
 - Clinically significant active cardiovascular disease including history of myocardial infarction within the past 6 months and/or heart failure (NYHA class III or IV) at the discretion of the investigator
 - Cancer or any clinically significant disease or disorder, which in the investigator’s opinion could interfere with the results of the trial
 - Palpable prostate nodule or induration, PSA > 3 ng/mL, prostatism, untreated sleep apnee syndrome, erythrocytosis (hematocrit > 50%) or hyperviscosity. (cfr. Endocrine Society Clinical Practice Guideline by Bhasin S et al. ref. 10)
 - Known or suspected abuse of alcohol or narcotics
 - Mental incapacity, unwillingness, or language barrier precluding adequate understanding or cooperation.
 
 |  | 
| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| There will be a pre- and post-intervention measurement of the tests (visit 1 and 2): - physical examination (length, weight, waist circumference, blood pressure and pulse)
 - insulin sensitivity
 - laboratory assessments
 - physical activity
 - sexual function
 - metabolic flexibility
 - NMR liver
 - Echocardiography
 |  | 
| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| There will be a pre- and post-intervention measurement of the tests (visit 1 and 2): visit 1: T = 0
 Visit 2: T = 4 months
 |  | 
| E.5.2 | Secondary end point(s) | 
| There will be a pre- and post-intervention measurement of the tests (visit 1 and 2): - physical examination (blood pressure and pulse)
 - Insulin sensitivity
 - physical activity
 - NMR liver
 - Echocardiography
 |  | 
| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| There will be a pre- and post-intervention measurement of the tests (visit 1 and 2): visit 1: T = 0
 Visit 2: T = 4 months
 |  | 
| 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 | No | 
| E.6.5 | Efficacy | No | 
| E.6.6 | Pharmacokinetic | No | 
| E.6.7 | Pharmacodynamic | No | 
| 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) | No | 
| E.7.3 | Therapeutic confirmatory (Phase III) | No | 
| E.7.4 | Therapeutic use (Phase IV) | Yes | 
| E.8 Design of the trial | 
| E.8.1 | Controlled | Yes | 
| E.8.1.1 | Randomised | Yes | 
| E.8.1.2 | Open | No | 
| E.8.1.3 | Single blind | No | 
| E.8.1.4 | Double blind | Yes | 
| E.8.1.5 | Parallel group | No | 
| 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) | No | 
| E.8.2.2 | Placebo | Yes | 
| E.8.2.3 | Other | No | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | The trial involves single site in the Member State concerned | Yes | 
| E.8.4 | The trial involves multiple sites in the Member State concerned | No | 
| E.8.5 | The trial involves multiple Member States | No | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA | No | 
| E.8.6.2 | Trial being conducted completely outside of the EEA | No | 
| E.8.7 | Trial has a data monitoring committee | No | 
| 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 | 
| end of trial = visit 2 (T = 4 months) |  | 
| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years |  | 
| E.8.9.1 | In the Member State concerned months |  | 
| E.8.9.1 | In the Member State concerned days |  |