1 Department of Hematology, University Hospital Vall d'Hebron, Barcelona, Spain; Experimental Hematology, Vall d'Hebron Institute of Oncology (VHIO), Barcelona, Spain; Department of Medicine, Universitat Autònoma de Barcelona, Bellaterra, Spain. Electronic address: giacoboni@vhio.net.
2 Department of Hematology, University Hospital of Düsseldorf and Center for Integrated Oncology Aachen-Bonn-Cologne-Düsseldorf, Düsseldorf, Germany. Electronic address: sascha.dietrich@med.uni-duesseldorf.de.
3 Department of Hematology, University Hospital of Düsseldorf and Center for Integrated Oncology Aachen-Bonn-Cologne-Düsseldorf, Düsseldorf, Germany.