1 National Institute for Public Health and the Environment (RIVM), Center for Nutrition, Prevention, and Health Services, Bilthoven, The Netherlands. Electronic address: simone.de.bruin@rivm.nl.
2 Department of Health Services Research, Care and Public Health Research Institute (CAPHRI) School for Public Health and Primary Care, Faculty of Health, Medicine, and Life Sciences, Maastricht University, Maastricht, The Netherlands.
3 National Institute for Public Health and the Environment (RIVM), Center for Nutrition, Prevention, and Health Services, Bilthoven, The Netherlands.