Received: 22 February 2019
Accepted: 25 April 2019
First Online: 14 May 2019
Ethics approval and consent to participate
: The Clinical Research Ethics Committee of the Primary Care Research Institute IDIAP Jordi Gol approved the study protocol. Only the participants who signed the informed consent form were included in the study.
: Not applicable
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.