Ullmann, Andrew J. ; Schmidt-Hieber, Martin [P:(DE-82)092847] ; Bertz, Hartmut ; Heinz, Werner J. ; Kiehl, Michael ; Krüger, William ; Mousset, Sabine ; Neuburger, Stefan ; Neumann, Silke ; Penack, Olaf ; Silling, Gerda [P:(DE-82)092848] ; Vehreschild, Jörg Janne ; Einsele, Hermann ; Maschmeyer, Georg ; Infectious Diseases Working Party of the German Society for Hematology and Medical Oncology (AGIHO/DGHO) and the DAG-KBT (German Working Group for Blood and Marrow Transplantation