1. From the Department I of Internal Medicine, Center for Integrated Oncology Aachen–Bonn–Cologne–Düsseldorf, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne (B.E., M.F., C.Z., S.R., F.S., A.-M.F., J.B., K.F., K.A.K., M. Hallek), the Clinic for Hematology and Stem Cell Transplantation, West German Cancer Center, University Hospital Essen, University of Duisburg–Essen, Essen (J.T.), the Division of Chronic Lymphocytic Leukemia, Department of Internal Medicine III,...