1. Karolinska Institutet, Department of Oncology-Pathology, Karolinska University Hospital, Stockholm, Sweden
2. Department of Medical Psychology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
3. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
4. Department of Surgery, UCSF Comprehensive Cancer Center, San Francisco, California, USA