[1] Univ Hosp Rotterdam Dijkzigt, Erasmus MC, Dept Hematol, NL-3000 CA Rotterdam, Netherlands
[2] Med Spectrum Twente, Dept Internal Med, Enschede, Netherlands
[3] Erasmus MC, HOVON Data Ctr, Rotterdam, Netherlands
[4] Leyenburg Hosp, Dept Hematol, Rotterdam, Netherlands
[5] Univ Med Ctr Utrecht, Dept Hematol, Utrecht, Netherlands