Received: 25 October 2019
Accepted: 7 August 2020
First Online: 26 August 2020
Ethics approval and consent to participate
: Participants gave verbal consent prior to their participation. The study was carefully explained and any questions or doubts were answered by the investigator. After the participants were clarified, those who agreed to participate gave their verbal consent before filling out the questionnaire.The project in which this study is included was submitted and approved by the Ethics Committee of the Portuguese Institute of Oncology – Porto.
: Not applicable.
: The authors declare that they have no competing interests.