Text and Data Mining valid from 2020-04-03
Received: 23 June 2017
Accepted: 30 January 2020
First Online: 3 April 2020
Ethics approval and consent to participate
: Ethical approval for this study was given by the Ethics and Research Committee of the Brazilian National Cancer Institute set in the context of service evaluation under number 96/09.
: Not applicable.
: The authors declare that they have no competing interests.