Funding for this research was provided by:
Fundación para la Investigacion Biomedica, Hospital Universitario Ramon y Cajal (IMP 18-05/2018)
Received: 20 March 2020
Accepted: 30 April 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: In accordance with Spanish National Regulations, this study was exempt of requiring approval by our Ethics Committee for Investigation (Hospital Ramon y Cajal, communication received on November 6 of 2018). We obtained written consent to participate from all enrolled institutions (positive reply to invitation letter and agreement to participate, see more information in Methods).
: Not applicable.
: The authors declare that they have no competing interests.