Received: 2 April 2019
Accepted: 16 September 2019
First Online: 15 October 2019
Ethics approval and consent to participate
: All patients provided written informed consent, and institutional review board approval was obtained (regional committee of clinical research of the Community of Madrid. REF 216/3). The study was performed in accordance with the tenets of the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.