1. Department of Hematology, Oncology and Rheumatology; Heidelberg University; Heidelberg Germany
2. Institute of Pathology; Heidelberg University; Heidelberg Germany
3. Institute of Medical Biometry and Informatics; Heidelberg University; Heidelberg Germany
4. Medical Faculty Mannheim, Institute of Transfusion Medicine and Immunology; German Red Cross Blood Service Baden-Württemberg - Hessen, Heidelberg University; Mannheim Germany