1. Center for Proton Therapy Paul Scherrer Institute, ETH Domain Villigen West Switzerland
2. Department of Radiation Oncology Inselspital, Bern University Hospital University of Bern Bern Switzerland
3. Department of Radiation Oncology University Hospital of Zürich Zürich Switzerland
4. Department of Pediatric Hematology and Oncology Working group Quality of Life University Hospital Bonn Bonn Germany
5. Department of Radiation Oncology Zentralklinik Bad Berka Bad Berka Germany
6. Department of Particle Therapy University Hospital Essen West German Proton Therapy Centre Essen (WPE) West German Cancer Centre (WTZ) German Cancer Consortium (DKTK) Essen Germany