1. Preventive Medicine and Public Health Training Unit PSMar-UPF-ASPB (Parc de Salut Mar-Pompeu Fabra University-Agència de Salut Pública de Barcelona), Barcelona, Spain
2. Department of Public Health, Danish Research Centre for Migration, Ethnicity and Health (MESU), University of Copenhagen, Copenhagen K, Denmark
3. Department of Health and Social Context, National Institute of Public Health, University of Southern Denmark, Odense, Denmark