[1] Amgen Inc, Hematol Oncol, Thousand Oaks, CA 91320 USA
[2] Amgen Inc, Biostat & Epidemiol, Thousand Oaks, CA 91320 USA
[3] Penn Oncol Hematol Associates Inc, Hematol, Philadelphia, PA USA
[4] Kantonsspital Graubunden, Chur, Switzerland
[5] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[6] Irmandade Santa Casa Misericordia Sao Paulo, Hematol, Sao Paulo, Brazil
[7] Alfred Hosp, Prahran, Vic 3181, Australia
[8] McGill Univ, Ctr Hlth, Montreal, PQ, Canada