Article History
Received: 9 March 2020
Accepted: 3 August 2020
First Online: 15 August 2020
Ethics approval and consent to participate
: The research protocol was approved by the National School of Public Health.Ethics approval was waived by the National School of Public Health institutional review board.The utilization of the data for the present study was authorized by both the Portuguese Central Administration of the Health System and the National School of Public Health.Once the participation of experts implied repeated answering of online questionnaires, the consent to participate was implicit should an answer be provided. No formal consent was required for this reason.
: Not applicable.
: The authors declare that they have no competing interests.