The study was approved by the Research Ethics Committee of the Teaching and Research Institute of Hospital Israelita Albert Einstein, São Paulo, SP.
El Comité de Ética en investigación, el Instituto de Enseñanza e Investigación, y el Hospital Israelita Albert Einstein, São Paulo-SP aprobaron el estudio.
O estudo foi aprovado pelo Comitê de Ética em Pesquisa, Instituto de Ensino e Pesquisa, Hospital Israelita Albert Einstein, São Paulo, SP.