Received: 6 March 2020
Accepted: 6 May 2020
First Online: 20 May 2020
Ethics approval and consent to participate
: This study was authorized by the research ethics committee of University Hospital La Paz, and all patients signed informed consent before operation. All tissue samples were acquired and used in accordance with contemporary regulatory guidelines.
: All authors approved the final manuscript for publication.
: The authors declare that they have no competing interests.