1. Postgraduate Studies Program in Cardiology, School of Medicine, Clinical Research Center, No. 5 Andar, Hospital de Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos 2350, 90035-903 Porto Alegre, RS, Brazil
2. Postgraduate Studies Program in Epidemiology, School of Medicine, Universidade Federal do Rio Grande do Sul, 90035-003 Porto Alegre, RS, Brazil
3. National Institute for Health Technology Assessment (IATS/CNPq), Hospital de Clinicas de Porto Alegre, 90035-903 Porto Alegre, RS, Brazil
4. Department of Clinical Medicine, Universidade de Pernambuco, 50670-901 Recife, PE, Brazil
5. Department of Tropical Medicine, Universidade Federal de Pernambuco, 50610-110 Recife, PE, Brazil
6. Research Center Aggeu Magalhães, Fundação Oswaldo Cruz, 50.670-420 Recife, PE, Brazil
7. Institute of Biological Sciences, Universidade de Pernambuco, 50670-901 Recife, PE, Brazil
8. Institute of Tropical Pathology and Public Health, Universidade Federal de Goiás, 74605050 Goiania, GO, Brazil