[1] Univ Ottawa, Ottawa Hosp,Ottawa Hlth Res Inst, Adult Reg Hemophilia Bleeding Disorders Comprehen, Ctr Transfus Res,Clin Epidemiol Res Unit, Ottawa, ON K1N 6N5, Canada
[2] Univ Ottawa, Fac Med, Ottawa, ON K1N 6N5, Canada
[3] Res & Dev CBS Toronto Ctr, Canadian Blood Serv, Toronto, ON M5G 2M1, Canada
[4] Univ Toronto, St Michaels Hosp, Div Hematol, Dept Med, Toronto, ON M5B 1W8, Canada
[5] Univ Toronto, Dept Med, Toronto, ON, Canada
[6] Univ Toronto, Dept Lab Med, Toronto, ON, Canada
[7] Univ Toronto, Dept Pathobiol, Toronto, ON, Canada