1. Department of Biostatistics, Erasmus University Medical Center, Rotterdam, the Netherlands
2. F. Hoffmann-La Roche, Basel, Switzerland
3. HOVON Data Center, Department of Hematology, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
4. Department of Hematology, Erasmus University Medical Center, Rotterdam, the Netherlands
5. Interuniversity Institute for Biostatistics and Statistical Bioinformatics, KU Leuven, Leuven, Belgium