Affiliation: | 1. Postgraduate Program in Epidemiology, Federal University of Pelotas, , Pelotas, Brazil;2. Department of Preventive Medicine, School of Medicine, University of S?o Paulo, , S?o Paulo, Brazil;3. Section of Child and Adolescent Psychiatry, Department of Psychiatry, Oxford University, , Oxford, UK;4. Postgraduate Program in Health and Behavior, Catholic University of Pelotas, , Pelotas, Brazil |