Funding for this research was provided by:
health department of the navarre government (project 007-2017)
Received: 19 March 2019
Accepted: 10 October 2019
First Online: 2 December 2019
Ethics approval and consent to participate
: The study protocol was approved by the Navarre Ethical Committee for Medical Research (Pyto 2016/31).
: Not applicable.
: The authors declare that they have no competing interests.