1. EpiUnit, Instituto de Saúde Pública da Universidade do Porto, Porto, Portugal
2. Department of Public Health Science, Mid Sweden University, Sundsvall, Sweden
3. Faculty of Health and Wellbeing, Canterbury Christ Church University, Canterbury, United Kingdom
4. Department of Sociology, National School of Public Health, Athens, Greece
5. University of Applied Sciences Emden, Emden, Germany
6. Department of Psychology, Mid Sweden University, Östersund, Sweden
7. Institute of Sociology, Hungarian Academy of Sciences, Budapest, Hungary
8. Department of Sciences of Public Health, Forensics, and Medical Education, Faculty of Medicine, University of Porto, Porto, Portugal; and president, EpiUnit, Instituto de Saúde Pública da Universidade do Porto, Porto, Portugal