Received: 20 January 2019
Accepted: 13 September 2019
First Online: 28 October 2019
Ethics approval and consent to participate
: This study has been reviewed by our Research ethics committee in Ramon y Cajal University, all procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: We have obtained a written consent from all the patients included in our study with institutional consent forms.
: The authors declare that they have no competing interests.