Text and Data Mining valid from 2019-12-01
Received: 19 August 2019
Accepted: 15 November 2019
First Online: 30 December 2019
Ethics approval and consent to participate
: All authors confirm that this work respects the International Committee of Medical Journal Editors (ICMJE) and the Declaration of Helsinki.
: A written informed consent was previously obtained from the patients for this publication.
: The authors declare that they have no competing interests.