1. University Hospital Zurich, Zurich, Switzerland
2. University of Zurich, Zurich, Switzerland
3. University Medical Center Hamburg-Eppendorf, Hamburg, Germany
4. Zurich, Wilen bei Wollerau, Switzerland
5. Cancer League Ostschweiz, St Gallen, Switzerland.
6. Charité–Universitätsmedizin Berlin, Berlin, Germany
7. University of Maryland School of Medicine, Baltimore, MD, USA