1 Department of Hematology, University Medical Center Utrecht, Utrecht, The Netherlands.
2 EBMT Statistical Unit, Leiden, The Netherlands.
3 EBMT Leiden Study Unit, Leiden, The Netherlands.
4 Institut Paoli-Calmettes, Centre de Lutte Contre le Cancer; Centre d'Investigations Cliniques en Biothérapies, Université d'Aix-Marseille, Inserm, CBT 1409, Marseille, France.
5 Service d'Hématologie Clinique et Thérapie Cellulaire, Hôpital Saint-Antoine, AP-HP, Sorbonne Université, Centre de Recherche Saint-Antoine (CRSA), INSERM, Paris, France.
6 San Raffaele Scientific Institute, Hematology and Bone marrow Transplantation Unit, Milan, Italy.
7 Department of Hematology, University Medical Center Utrecht, Utrecht, The Netherlands. j.h.e.kuball@umcutrecht.nl.