| Addition |
Member Dutch Society of Oncology, Dutch Pediatric Association, Royal Dutch Society of Medicine, American Society of Hematology, American Association of Cancer research, European Haematology Association, International Society of Pediatric Oncology; Member Dutch Childhood Leukemia Study Group committees on acute Lymphoblastic Leukemia-10"and "Relapsed Acute Myeloid Leukemia-1999"; Chairman of the "AML Committee"of the International BFM Study Group; Member of the "Committee of Scientific Research" |