Affiliation: | 1. Postgraduate Program in Cardiology and Cardiovascular Sciences, School of Medicine, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil;2. School of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil;3. Department of Internal Medicine, Hospital Nossa Senhora da Conceição, Porto Alegre, Brazil;4. Cardiovascular Surgery Department, Hospital de Clínicas de Porto Alegre (HCPA), Porto Alegre, RS, Brazil |