[1] Mayo Clin, Dept Hlth Sci Res, Rochester, MN USA
[2] Kalmar Cty Hosp, Dept Internal Med, Kalmar, Sweden
[3] BC Canc Agcy, Vancouver, BC, Canada
[4] Skane Univ Hosp, Lund, Sweden
[5] Mayo Clin, Div Hematol, Rochester, MN USA
[6] BC Canc Agcy, Ctr Lymphoid Canc, Vancouver, BC, Canada
[7] Karolinska Inst, Dept Med, Clin Epidemiol Unit, Stockholm, Sweden
[8] Mayo Clin, Rochester, MN USA
[9] Univ Iowa Hosp & Clin, Div Hematol Oncol & Blood Marrow Transplantat, Iowa City, IA USA
[10] Lund Univ, Dept Oncol, Lund, Sweden
[11] Mayo Clin, Dept Lab Med & Pathol, Rochester, MN USA