1 Department of Health Sciences, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands.
2 Department of Sociology, Interuniversity Center for Social Science Theory and Methodology (ICS), University of Groningen, Grote Rozenstraat 31, 9712 TG, Groningen, The Netherlands.
3 Pediatric Research Center, New Children's Hospital, University of Helsinki, Biomedicum 2 C 6th Floor, Tukholmankatu 8 C, 00029, Helsinki, HUS, Finland.
4 WHO Collaborating Centre for Research in the Patient Perspective on Medicine Use, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark.
5 Institute of Environmental Health, School of Medicine, University of Lisbon, FMH Estrada da Costa, Cruz Quebrada, 1499-000, Lisboa Codex, Portugal.
6 GGD GHOR Netherland/National Health Services, Public Youth Healthcare, Zwarte Woud 2, 3524 SJ, Utrecht, The Netherlands.
7 School of Public Health Imperial College London, St Dunstan's Rd, London, W6 8RF, UK.
8 Institute of Health Sciences, School of Health Professions, Zurich University of Applied Sciences, Zurich, Switzerland. Julia.dratva@zhaw.ch.
9 Medical Faculty, University of Basel, Basel, Switzerland. Julia.dratva@zhaw.ch.