1. Postgraduate Studies Program in Epidemiology, Department of Social Medicine, School of Medicine, Federal University of Rio Grande do Sul, 2400 Ramiro Barcelos St., 2nd Floor, Porto Alegre 90035-003, Brazil
2. Hospital de Clínicas de Porto Alegre, Porto Alegre 90035-903, Brazil
3. Postgraduate Studies Program in Food, Nutrition and Health, Department of Nutrition, School of Medicine, Federal University of Rio Grande do Sul, Porto Alegre 90035-003, Brazil