1. BOWA-electronic GmbH & Co. KG, Gomaringen, Germany
2. Institute of Electrical Energy Conversion, University of Stuttgart, Stuttgart, Germany
3. Department of Internal Medicine II and Clinic of Oncology and Hematology, University Hospital of Hamburg-Eppendorf, Hamburg, Germany
4. Department of Medical Oncology and Pulmology, Eberhard Karls University of Tübingen, Tübingen, Germany