1. Department of Medical and Clinical Psychology; Center of Research on Psychology in Somatic diseases (CoRPS); Tilburg University; Tilburg the Netherlands
2. PoZoB; Veldhoven the Netherlands
3. Department of Internal Medicine; Radboud University Nijmegen Medical Centre; Nijmegen the Netherlands
4. Department of Internal Medicine; Haaglanden Medical Centre; The Hague the Netherlands
5. Department of Internal Medicine; VU University Medical Centre; Amsterdam the Netherlands
6. Department of Medical Psychology; VU University Medical Centre; Amsterdam the Netherlands