1. Department of Epidemiology, School of Public Health, University of Sao Paulo, Sao Paulo, Brazil.
2. Department of Preventive Medicine, Federal University of Sao Paulo, Sao Paulo, Brazil.
3. Internal Medicine Department, University of Sao Paulo, Sao Paulo, Brazil.
4. Faculdade Israelita de Ciencias da Saude Albert Einstein, Sao Paulo, Brazil.