[1] Univ Amsterdam, Acad Med Ctr, Dept Hematol, NL-1105 AZ Amsterdam, Netherlands
[2] Mayo Clin, Rochester, MN USA
[3] Univ Cologne, Dept Internal Med 1, D-50931 Cologne, Germany
[4] Univ Cologne, Ctr Integrated Oncol, D-50931 Cologne, Germany
[5] Univ Texas MD Anderson Canc Ctr, Leukemia Dept, Houston, TX 77030 USA