1. University Hospitals Leuven, Department of Internal Medicine, Katholieke Universiteit Leuven, Leuven, Belgium.
2. Institute of Nursing Science, University of Basel, Basel, Switzerland.
3. Center for Health Services and Nursing Research, School for Public Health, Faculty of Medicine, Leuven, Belgium.
4. Rega Institute, Katholieke Universiteit Leuven, Leuven, Belgium.