Article History
Received: 7 June 2020
Accepted: 30 September 2020
First Online: 8 October 2020
Ethics approval and consent to participate
: All participants agreed to participate in the study by signing a written informed consent. The protocol of the investigation was approved by two independent ethical research committees from a hospital (Hospital 12 de Octubre, code: 18/170) and a university (Universidad Autónoma de Madrid, code: CEI-88-1659).
: Not applicable.
: The authors declare that they have no competing interests.