[1] Haugesund Hosp, Dept Res & Innovat, POB 2170, N-5504 Haugesund, Norway
[2] Leeds Teaching Hosp, Dept Haematol, Leeds, W Yorkshire, England
[3] Haukeland Hosp, Dept Med, Sect Hematol, Bergen, Norway
[4] Univ Paris Est, Henri Mondor Hosp, AP HP, Dept Med, Creteil, France