Text and Data Mining valid from 2018-07-11
Received: 27 February 2018
Accepted: 12 April 2018
First Online: 11 July 2018
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the Hospital de Clínicas de Porto Alegre, and an informed consent form was obtained from all participants.
: The authors declare that they have no competing interests.
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