[1] Univ Geneva, Med Ctr, Div Angiol & Haemostasis, Dept Internal Med,Fac Med, CH-1211 Geneva 14, Switzerland
[2] Univ Hosp Geneva, Geneva, Switzerland
[3] Univ Paris 06, INSERM, Unite Pharmacogenet,UMR S 621, AP HP,Hop Pitie Salpetriere,Serv Pharmacol, Paris, France
[4] Univ Paris 05, INSERM, Serv Hematol Biol, AP HP,Hop European Georges Pompidou,Unite 765, Paris, France