Received: 14 May 2019
Accepted: 29 July 2019
First Online: 7 August 2019
Ethics approval and consent to participate
: Written informed consent was obtained from all individual participants included in the study. Data collection in EVEREG was approved by the Ethical Committee CEIC Parc de Salut Mar with number 2012/4908/I.
: Not applicable.
: The authors declare that they have no competing interests.