1 Department of Epidemiology & Biostatistics, Amsterdam Public Health, Research Institute, VU University Medical Center, De Boelelaan 1089a, 1081HV, Amsterdam, The Netherlands. [email protected].
2 Department of Epidemiology & Biostatistics, Amsterdam Public Health, Research Institute, VU University Medical Center, De Boelelaan 1089a, 1081HV, Amsterdam, The Netherlands.
3 University Library, VU, Amsterdam, The Netherlands.
4 Amsterdam School for Communication Research, University of Amsterdam, Amsterdam, The Netherlands.
5 Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands.