1 Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, Heidelberg, Germany.
2 Medical Oncology and Supportive Care Department, Foch Hospital, Suresnes, France.
3 Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, Heidelberg, Germany. Electronic address: karin.jordan@med.uni-heidelberg.de.