Funding for this research was provided by:
Ministerio de Economía, Industria y Competitividad, Gobierno de España (DEP2013-45966-P)
Received: 27 April 2020
Accepted: 31 August 2020
First Online: 9 September 2020
Ethics approval and consent to participate
: All the subjects were informed of the purpose and demands of the study before giving their written consent to participate. The protocol was in accordance with the Declaration of Helsinki for research of human subjects and was approved by the Balearic Islands Clinical Investigation Ethics Committee (reference IB 2399/14 PI).
: Not applicable.
: The authors declare that they have no competing interests.