1. Hospital de Clinicas de Porto Alegre, Federal University of Rio Grande do Sul Porto Alegre
2. Ministry of Health Rio de Janeiro
3. Department of Internal Medicine, School of Medicine, Pontifícia Universidade Católica of Rio Grande do Sul Porto Alegre
4. Department of Preventive Medicine, Universidade Federal de São Paulo São Paulo, Brazil
5. Department of Social Medicine, School of Medicine, Federal University of Rio Grande do Sul Porto Alegre