1. Division of Cancer Epidemiology; German Cancer Research Center (DKFZ); Heidelberg Germany
2. Medical Faculty Mannheim, and German Red Cross Blood Service Baden-Württemberg-Hessen; Institute of Transfusion Medicine and Immunology, Heidelberg University; Mannheim Germany
3. Division of Clinical Epidemiology and Aging Research; German Cancer Research Center (DKFZ); Heidelberg Germany