Affiliation: | aDepartment of Health Care Studies/Section Nursing Science, Faculty of Health Sciences, Universiteit Maastricht, P.O. Box 616, 6200 MD Maastricht, the Netherlands bDepartment of Methodology and Statistics, Faculty of Health Sciences, Universiteit Maastricht, P.O. Box 616, 6200 MD Maastricht, the Netherlands cDeventer Hospital, Department of Dermatology, P.O. Box 5001, 7400 GC Deventer, the Netherlands dDepartment of Physiology, Faculty of Medicine, Universiteit Maastricht, P.O. Box 616, 6200 MD Maastricht, the Netherlands |