Funding for this research was provided by:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Text and Data Mining valid from 2018-06-22
Received: 7 May 2018
Accepted: 1 June 2018
First Online: 22 June 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of the Ética e Pesquisa da Faculdade de Medicina da Universidade de São Paulo (Protocol 350/13) and all participants gave their informed consent before participation.
: The authors declare that they have no competing interests.
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