1. Frans Clignet, MSc, RN, CNS, is in Faculty of Behavioural and Movement Sciences; Section of Clinical Psychology; VU Amsterdam Amsterdam The Netherlands
2. EMGO Institute for Health Care and Research; VU University Medical Center; Amsterdam The Netherlands
3. Altrecht, Institute for Mental Health Care; Old Age Psychiatry; Den Dolder The Netherlands
4. Research Group Mental Health Nursing; Inholland University of Applied Sciences; Amsterdam The Netherlands
5. Berno van Meijel, PhD, RN, is in Research; Group Mental Health Nursing; Inholland University of Applied Sciences; Amsterdam The Netherlands
6. Parnassia Psychiatric Institute; The Hague The Netherlands
7. Department of Psychiatry; VU Amsterdam Medical Center; Amsterdam The Netherlands
8. Annemieke van Straten, PhD, is in Faculty of Behavioural and Movement Sciences; Section of Clinical Psychology; VU Amsterdam Amsterdam The Netherlands
9. and Pim Cuijpers, PhD, is in Faculty of Behavioural and Movement Sciences; Section of Clinical Psychology; VU Amsterdam Amsterdam The Netherlands