1. Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas Brazil
2. Centre for Global Child Health, University of Toronto, Toronto, ON, Canada
3. Maternal and Child Health Department and Postgraduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil
4. Postgraduate Program in Health and Behavior, Catholic University of Pelotas, Pelotas, Brazil
5. University of São Paulo, Brazil
6. Federal University of Pelotas, Brazil