Received: 20 June 2019
Accepted: 23 October 2019
First Online: 6 November 2019
Ethics approval and consent to participate
: The study project was assessed and approved by Research Ethics Committee of ‘Universidade Federal de São Paulo’ (Protocol n. ° 0798/2016). The active patients included in the study received the information about it and signed the Informed Consent Form. Three attempts were made to contact by phone patients who were no longer undergoing treatment and they were informed of the present study and invited to sign the form if they wished to do so. Nevertheless, since it was necessary to work retroactively in revising patients’ registers the contact was not successful. In such cases the Ethical Committee authorized the use of data without the Informed Consent Form, but the researchers were compromised to keep privacy of the collected data remained.
: Not applicable.
: The authors declare that they have no competing interests.