1. KU Leuven Department of Public Health and Primary Care, KU Leuven—University of Leuven , Kapucijnenvoer 7 PB7001, 3000 Leuven , Belgium
2. School of Nursing, Columbia University , 560 West 168th Street, New York, NY 10032 , USA
3. Department of Biobehavioral Health Sciences, University of Pennsylvania School of Nursing , 418 Curie Blvd, Philadelphia, PA 19104 , USA