1. Department of Medical Oncology, Hematology, Immunology, Rheumatology and Pulmonology, Medical Center II, South West German Comprehensive Cancer Center, University Hospital of Tuebingen, Tuebingen, Germany;
2. Department of Internal Medicine III (Hematology, Oncology, Pneumology), Johannes Gutenberg University Medical Center, Mainz, Germany;
3. Institute for Immunology, Johannes Gutenberg University Medical Center, Mainz, Germany;
4. Department of Pediatric Hematology and Oncology, University Children's Hospital, Tuebingen, Germany;
5. Institute of Medical Microbiology and Hygiene, Eberhard Karls University Tuebingen, Tuebingen, Germany; and
6. Department of Immunology, Institute for Cell Biology, Eberhard Karls University Tuebingen, Tuebingen, Germany