1. Medical Oncology and Hematology; Kantonsspital Graubünden; Chur Switzerland
2. Departement of Internal Medicine V, Hematology/Oncology; University Hospital Innsbruck; Austria
3. Oncology and Hematology; Kantonsspital St. Gallen; St. Gallen Switzerland
4. Statistics Unit; SAKK Swiss Group for Cancer Research Coordinating Center; Bern Switzerland