Funding for this research was provided by:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (472991/2012-4)
Received: 27 April 2017
Accepted: 1 March 2018
First Online: 7 March 2018
Ethics approval and consent to participate
: Informed consent was obtained from all individual participants included in the study.The participants, after accessing the link available in the message, were sent to a screen with a complete informed consent and, after reading it, chose to click on “accept” or “not accept”. Participants who agreed to participate were directed to the screen of the questionnaire. The consent form and ethical research procedures were approved by the Ethics Committee of Universidade Federal de São Paulo (no. 250.091).
: Not applicable.
: Dr. Sanchez is an Associated Editor at BMC Public Health.
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