Received: 18 July 2019
Accepted: 7 October 2019
First Online: 29 October 2019
Ethics approval and consent to participate
: The Committees for Human Subjects of La Paz University Hospital (PIE2392) and Vall d’Hebron University Hospital (PR (ATR)122/2019) approved the study, which was conducted in accordance with the ethical guidelines of the 1975 Declaration of Helsinki. All samples were in compliance with the guidelines approved by the local ethics committee. All participants provided written informed consent to participate in the study.
: Written informed consent for publication was provided by the participants.
: The authors declare that they have no competing interests.