1. Expert Center for Chronic Fatigue, Department of Medical Psychology, Amsterdam Public Health Research Institute; VU University Medical Center; Amsterdam The Netherlands
2. Department of Medical Psychology; Radboud University Medical Center; Nijmegen The Netherlands
3. Department of Medical Psychology, Academic Medical Center; University of Amsterdam; Amsterdam The Netherlands
4. Department for Health Evidence; Radboud University Medical Center; Nijmegen The Netherlands
5. Department of Health Psychology, University Medical Center Groningen; University of Groningen; Groningen The Netherlands
6. Department of Internal Medicine; VieCuri Medical Centre; Venlo The Netherlands
7. Department of Medical Oncology; Radboud University Medical Center; Nijmegen The Netherlands