1. Department of Medicine VHeidelberg UniversityHeidelbergGermany
2. Stem Cell LaboratoryIKTZ Heidelberg GmbHHeidelberg Germany
3. Institute of Medical Biometry and InformaticsHeidelberg UniversityHeidelbergGermany
4. Institute of PathologyHeidelberg UniversityHeidelbergGermany
5. Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Heidelberg University, German Red Cross Blood Service Baden‐Württemberg–HessenMannheim Germany