| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
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| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 8.1 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10018937 | 
 
| E.1.2 | Term  | Haemophilia A | 
 
 
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| 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 is to evaluate the effect of a once-a-week prophylaxis regimen with BAY 79-4980 on the frequency of all bleeds compared to once-a-week prophylaxis regimen and to on-demand treatment (OD) with rFVIII-FS in WFI (Kogenate Bayer).  | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
| The main secondary objective is to evaluate the effect of a once-a-week prophylaxis regimen with BAY 79-4980 on the frequency of spontaneous bleeds (e.g joints, muscle) compared to once-a-week prophylaxis regimen and on-demand treatment (OD) with rFVIII-FS-WFI (Kogenate Bayer). | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
•  Males aged 12 to 70 years •  Severe hemophilia A (< 1% FVIII:C) •  150 ED with any FVIII, > 20 ED during last year •  On-demand treatment for the past year (Subjects having received isolated             courses of prophylaxis for 6 consecutive weeks or less in a maximum of 2 occasions in the previous 12 months are also eligible) •  At least 20 documented bleeds during the last 12 months (Or equivalent annualized bleeding frequency in no less than the previous 6 months, or documented corresponding infusions > 4 days apart, or if the treating physician confirms this bleeding frequency and this information is documented in the subjects medical records or a combination of them). •  No current evidence of inhibitor antibody measured using the Nijmegen modified Bethesda assay (<0.6 BU/mL) in two consecutive samples and absence of clinical signs or symptoms of decreased response to FVIII administration. (First negative sample can be historical if obtained within 3 months prior to screening and measured by Nijmegen. Second sample –confirmatory- must in all cases be performed by the central lab. If a first recent sample is not available then 2 negative samples by central lab at least 1 week apart should be obtained). At least 3 days without receiving FVIII must have passed prior to collect samples for inhibitors.  •  No history of FVIII inhibitor antibody formation. (Subjects with a maximum historical titer of 1.0 BU in no more than one occasion with the Classical Bethesda assay but at least three successive negative [<0.6 BU] thereafter are also eligible) •  Written informed consent by subject and parent / legal representative, if  < 18 years 
 
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| E.4 | Principal exclusion criteria | 
• Individuals with von Willebrand disease •  Any individual with thrombocytopenia (platelets  < 100 000/mm3) •  Any individual with  abnormal renal function (serum creatinine > 2.0 mg/dL) •  Any individual with  active hepatic disease (AST or ALT > 5xULN) •  Any individual on treatment with immunomodulatory agents within the last 3  months prior to study entry or during the study. (the following drugs are allowed: alpha interferon treatment for HCV, HAART therapy for HIV and/or a total of two courses of pulse treatment with steroids for a maximum of 7 days at 1mg/kg or less) •  Any individual with (HIV, HCV or due to another suspicious condition) an absolute CD4 lymphocyte cell count < 250 cells/mm3 •  Individuals with positive Lupus Anticoagulant antibodies  •  Any individual with known hypersensitivity to the active substance, mouse or hamster protein, liposomes or PEG •  Any individual who was receiving or had received other experimental drugs within 3 months prior to study  entry •  Any individual who required any pre-medication for FVIII infusions (e.g. anti-histamines) •  Any individual with hypertension (diastolic blood pressure > 100 mmHg) which is uncontrollable with proper medication •  Any individual with known unstable coronary artery angina and/or with known history of myocardial infarction.  •  Any individual who is unwilling to comply with study visits or any of the possible treatment regimens (e.g. not willing to receive on-demand treatment for one year) •  Planned major surgery (including orthopedic) during the study 
 •  Planned radio-isotopic synovectomy during the study 
 •  Any individual who is not suitable for participation in this study for any reason, according to the Investigator 
 •  Only for subjects participating in the PK substudy:  
 o	Any individual receiving any pegylated medication (i.e. PEG interferon) in th e month prior to the PK session o	Any subject not willing to or able to comply with fasting requirements (from 10pm previous night until 6 hours post infusion)   
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| The primary efficacy variable will be the number of all bleeds (spontaneous and trauma) occurring during 49 weeks of active treatments excluding the cumulative 10 weeks of placebo treatment | 
 
 
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| 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 |  No  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| 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 |  Information not present in EudraCT  | 
| E.7.1.2 | Bioequivalence study |  Information not present in EudraCT  | 
| E.7.1.3 | Other |  Information not present in EudraCT  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  No  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  Yes  | 
| 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  |  Yes  | 
| 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  |  Yes  | 
| E.8.2.3 | Other |  No  | 
| 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 | 2 | 
| E.8.5 | The trial involves multiple Member States |  Yes  | 
| E.8.5.1 | Number of sites anticipated in the EEA | 30 | 
| 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 |  Information not present in EudraCT  | 
| 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 | 
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| 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
                     | 
| is provided in the protocol | 
 
 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 1 | 
| E.8.9.1 | In the Member State concerned months | 10 | 
| E.8.9.1 | In the Member State concerned days |  | 
| E.8.9.2 | In all countries concerned by the trial years | 1 | 
| E.8.9.2 | In all countries concerned by the trial months | 10 |