Affiliation: | 1. Federal University of Pernambuco, Av. Prof. Moraes Rego, 1235, Cidade Universitária, Recife, PE, 50670-901, Brazil 2. Federal University of S?o Paulo, S?o Paulo, Brazil 3. Memorial Guararapes Hospital, Jaboat?o dos Guararapes, Brazil 4. Real Portuguese Hospital, Recife, Brazil
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