[1] Univ Nice Sophia Antipolis, Dept Hematol, Cimiez Univ Hosp, F-06189 Nice, France
[2] Univ Hosp S Orsola Malpighi, Dept Angiol & Blood Coagulat Marino Golinelli, Bologna, Italy
[3] Univ Ottawa, Dept Med, Div Hematol, Ottawa Hlth Res Inst, Ottawa, ON, Canada
[4] Duke Univ, Med Ctr, Clin Coagulat Lab, Durham, NC USA