1 Andreas Burchert, MD, Stephan K. Metzelder, MD, and Andreas Neubauer, MD, Department of Internal Medicine, Hematology, Oncology and Immunology, Philipps University Marburg and University Hospital Giessen and Marburg, Campus Marburg, Marburg, Germany and Michael Wittenberg, PhD, and Carmen Schade-Brittinger, Coordinating Center for Clinical Trials, Philipps-University Marburg, Marburg, Germany.