1. Department of Medicine A, Hematology, Oncology and Pulmonary Medicine; University Hospital Muenster; Muenster Germany
2. Institute of Biostatistics and Clinical Research; Westfaelische Wilhelms-Universitaet Muenster; Muenster Germany
3. Gerhard-Domagk-Institute of Pathology; University Hospital Muenster; Muenster Germany