Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (141998/2013-0, 202310/2015-9, 309647/2015-0)
Text and Data Mining valid from 2018-04-30
Received: 25 August 2017
Accepted: 10 April 2018
First Online: 30 April 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of ‘Faculdade de Saude Publica of Universidade de São Paulo (CAAE 25774614.1.0000.5421).
: The authors declare that they have no competing interests.
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