1. Klinikum Nord; Medizinische Klinik 5-Schwerpunkt Onkologie/Haematologie; Prof.-Ernst-Nathan-Str. 1 Nuernberg Germany D-90419
2. Beijing University of Chinese Medicine; Centre for Evidence-Based Chinese Medicine; 11 Bei San Huan Dong Lu, Chaoyang District Beijing China 100029
3. University of Bern; Institute of Social and Preventive Medicine; Finkelhubelweg11 Bern Switzerland 3012