Received: 20 March 2018
Accepted: 23 July 2018
First Online: 20 September 2018
Ethics approval and consent to participate
: The PNS was approved by the National Commission of Ethics in Research of the National Health Council under the opinion n ° 328.159. All interviewees who were part of the final sample agreed to participate in the study and signed the Informed Consent Term.
: Not applicable.
: The authors declare that they have no competing interests.
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