[1] Ostfold Hosp, Dept Med, Oslo, Norway
[2] Ostfold Hosp, Dept Hematol, Oslo, Norway
[3] Ostfold Hosp, Dept Res, Oslo, Norway
[4] Univ Oslo, Oslo Univ Hosp, Inst Clin Med, Dept Haematol, Oslo, Norway
[5] Akershus Univ Hosp, Div Med, Hematol Res Grp, Lorenskog, Norway
[6] Evidera, 201 Talgarth Rd, London W6 8BJ, England
[7] Bristol Myers Squibb, Lysaker, Norway
[8] Bristol Myers Squibb, Uxbridge, Middx, England
[9] Oslo Univ Hosp Ulleval, Dept Cardiol, Oslo, Norway
[10] Univ Oslo, Oslo, Norway