1. Department of Surgical Oncology, University Medical Center Groningen University of Groningen Groningen The Netherlands
2. Department of Research and Development Netherlands Comprehensive Cancer Organization (IKNL) Utrecht The Netherlands
3. Department of Epidemiology, University Medical Center Groningen University of Groningen Groningen The Netherlands
4. Department of Internal Medicine, Endocrinology, University Medical Center Groningen University of Groningen Groningen The Netherlands