Text and Data Mining valid from 2018-04-03
Received: 30 November 2017
Accepted: 26 March 2018
First Online: 3 April 2018
Ethics approval and consent to participate
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions.The Research Ethics Committee ofFaculdade de Medicina da Universidade de São Paulo(FMUSP) approved the study protocol.Consent to participate: this is a retrospective study and consent to participate was waived by the Research Ethics Committee ofFaculdade de Medicina da Universidade de São Paulo(FMUSP).
: Not applicable.
: The authors declare that they have no competing interests.
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