1. Department of Radiation Oncology, Eberhard Karls University Tübingen, Tübingen, Germany
2. Department of General Pediatrics, Oncology/Hematology, Eberhard Karls University Tübingen, Tübingen, Germany
3. Provenance Biopharmaceuticals, Carlisle, MA, USA
4. Merck Serono R&D, Global Early Development, Darmstadt, Germany