[1] Univ Med Ctr Hamburg Eppendorf, Inst Med Psychol, Hamburg-Eppendorf, Germany
[2] German Haemophilia Soc DHG, Hamburg, Germany
[3] Swiss Hemophilia Assoc SHG, Altstatten, Switzerland
[4] Swiss Hemophilia Network SHN, Zurich, Switzerland
[5] Univ Childrens Hosp, Dept Hematol, Zurich, Switzerland
[6] Austrian Hemophilia Soc OHG, Vienna, Austria
[7] Med Univ Vienna, Dept Med I, Vienna, Austria
[8] Univ Clin Bonn, Inst Expt Haematol & Transfus Med, Bonn, Germany