Institution: | 1. Instituto de Cardiologia do Rio Grande do Sul/Funda??o Universitária de Cardiologia (IC/FUC), Porto Alegre, Brazil 2. Universidade Federal do Rio Grande do Sul, Endocrine Division HCPA, Porto Alegre, Brazil 3. Institute of Biomedical Scientes, University of S?o Paulo, S?o Paulo, Brazil 4. Instituto do Cora??o (INCOR), S?o Paulo, Brazil
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