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Article History

Received: 8 October 2018

Accepted: 15 November 2019

First Online: 26 November 2019

Ethics approval and consent to participate

: National coordinators obtained approval from local research ethics committees in each country to conduct the survey. The approval of the ethics committee of the coordinating centre was done on June 10th 2015, with the reference number 4R15/117 (IDIAP Jordi Gol). The approval of the ethics committee of other centres were done by the Commitee for Medical Ethics of Heath Ministry of Slovenia (Slovenia), the Ethics Committee of the Yeditepe University, Faculty of Medicine (Turkey), Comité de Protection des Personnes (CPP) Sud-Ouest et Outre Mer III and Comité Consultatif sur le Traitement de l'Information en matière de Recherche dans le domaine de la Santé (CCTIRS), (France), the Ethics Commitee of Medical faculty University of Zagreb (Croatia) and the Health Ethics Committee of the Regional Health Administration of Northern Portugal (Portugal).Participation in the survey was voluntary. Written informed consent was obtained from every participant before the questionnaire was answered. Confidentiality was maintained by data coding to eliminate the identification of data with personal information.

: Not applicable.

: The authors declare that they have no competing interests.