Received: 16 July 2020
Accepted: 4 June 2021
First Online: 29 June 2021
: The study was approved by the Ethics Committee of the Local Health Unit of the Alto Minho (ULSAM) and was performed in accordance with the Declaration of Helsinki. All survey respondents provided verbal informed consent to participate when the questionnaires were handed out to them by the research authors and the questionnaires were preceded by a sheet indicating the objective of the study and the condition of anonymity and the right to withdraw from participating at any time; confidentiality was maintained through the use of a serial codes in all questionnaires. Verbal informed consent was considered adequate and sufficient due the nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.