1. Department of Hematology, Leiden University Medical Center, Leiden, The Netherlands
2. Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands
3. Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
4. Department of Hematology, Haga Hospital, The Hague, The Netherlands
5. Department of Pathology, Haga Hospital, The Hague, The Netherlands
6. Department of Pathology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands