1. Titus A. A. Beentjes, MScN, APRN, RN, Radboud university medical center, Radboud Institute for Health Sciences, IQ healthcare, Nijmegen, the Netherlands; Dimence Group Mental Health Care Centre, Deventer, the Netherlands; Centre for Nursing Research, Saxion University of Applied Science, Deventer, the Netherlands
2. Betsie G. I. van Gaal, PhD, FEANS, Radboud university medical center, Radboud Institute for Health Sciences, IQ healthcare, Nijmegen, the Netherlands; HAN University of Applied Sciences, Faculty of Health and Social Studies, Nijmegen, the Netherlands
3. Theo van Achterberg, PhD, FEANS, KU Leuven, Academic Centre for Nursing and Midwifery, Leuven, Belgium
4. Peter J. J. Goossens, PhD, APRN, RN, FEANS, Dimence Group Mental Health Care Centre, Deventer, the Netherlands; University Centre for Nursing and Midwifery, Department of Public Health and Primary Care, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium