Funding for this research was provided by:
Instituto de Salud Carlos III (PI/14/01259 and PI/17/00796)
Received: 2 June 2019
Accepted: 5 November 2019
First Online: 3 December 2019
Ethics approval and consent to participate
: This study was approved by the Research Ethics Board of the Hospital Clínico Universitario Virgen de la Arrixaca. Informed consent for participation was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.