Received: 16 November 2017
Accepted: 10 April 2018
First Online: 11 May 2018
Ethics approval and consent to participate
: This study was approved by the ethics committee of the Universidade Federal de São Paulo (CAAE; protocol 55970016.9.0000.5505). Informed consent will be obtained from all participants.
: Consent will be obtained from all participants.
: The authors declare that they have no competing interests.
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