[1] Univ Med Ctr Hamburg Eppendorf, Inst Med Psychol, Hamburg, Germany
[2] Lund Univ, Malmoe Haemophilia Ctr, Malmoe, South Africa
[3] Univ Saarland, Med Ctr, Inst Clin Haemostaseol & Transfus Med, Homburg, Germany
[4] Univ Med Ctr Hamburg Eppendorf, Med Clin & Policlin 2, Hamburg, Germany
[5] Great Ormond St Hosp Sick Children, Great Ormond St, London WC1N 3JH, England
[6] Univ Munich, Dept Haemostaseol & Transfus Med, Munich, Germany
[7] Baxalta Innovat GmbH, Vienna, Austria