1. The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital; Department of Physiotherapy; Plesmanlaan 121 Amsterdam Netherlands 1066CX
2. Academic Medical Centre, University of Amsterdam; Department of Clinical Epidemiology, Biostatistics and Bioinformatics; Tafelbergweg 51, Roomnr. D223 Amsterdam Netherlands
3. The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital; Department of Psychosocial Research, Division of Psychosocial Research & Epidemiology; Plesmanlaan 121 Amsterdam Netherlands 1066 CX
4. Academic Medical Center, University of Amsterdam; Department of Clinical Epidemiology and Biostatistics; Room J1b-214, PO Box 22700 Amsterdam Netherlands 1100 DE