1 Department of Laboratory medicine, Laboratory of Hematology, Radboud University medical center, Nijmegen, The Netherlands.
2 Department of hematology, Radboud University medical center, Nijmegen, The Netherlands.
3 Department of Human Genetics, Hannover Medical School, Hannover, Germany.
4 Department of Molecular Biology, Radboud University, Nijmegen, The Netherlands.
5 Department of Laboratory medicine, Laboratory of Hematology, Radboud University medical center, Nijmegen, The Netherlands. Joop.Jansen@Radboudumc.nl.