1. Comprehensive Cancer Centre The Netherlands (CCCNL); Utrecht The Netherlands
2. Department of Internal Medicine; Haga Hospital; The Hague The Netherlands
3. Department of Surgery; Leiden University Medical Centre; Leiden The Netherlands
4. Department of Internal Medicine; Bronovo Hospital; The Hague The Netherlands
5. Department of Internal Medicine; Groene Hart Hospital; Gouda The Netherlands
6. Radiotherapy Centre West; The Hague The Netherlands
7. Department of Clinical Oncology; Leiden University Medical Centre; Leiden The Netherlands