[1] Pfizer, Clin Affairs, Collegeville, PA USA
[2] Malmo Univ Hosp, Dept Clin Sci, Malmo, Sweden
[3] Oxford Haemophilia & Thrombosis Ctr, Oxford, England
[4] Sheffield Teaching Hosp Trust, Dept Haematol, Sheffield, S Yorkshire, England
[5] Clin Univ St Luc, B-1200 Brussels, Belgium
[6] Univ Medich Ctr Utrecht, Utrecht, Netherlands
[7] Azienda Osped Ferrarotto, Catania, Italy
[8] Osped Maggiorore, Ctr Emostasi & Curaemofilia, Parma, Italy