1. French Reference Center for Aplastic Anemia and Paroxysmal Nocturnal Hemoglobinuria, Saint Louis Hospital, Paris, France
2. University Paris Diderot, Paris, France
3. Department of Clinical Medicine and Surgery, Federico II University of Naples, Naples, Italy
4. Severe Aplastic Anemia Working Party of the European Group for Blood and Marrow Transplantation, Leiden, Netherlands