Text and Data Mining valid from 2019-07-25
Received: 10 May 2019
Accepted: 17 July 2019
First Online: 25 July 2019
Ethics approval and consent to participate
: The Institutional Review Board reviewed and approved the study. Consent to participate for this study was waived as no individual patients were identified.
: Not applicable.
: The authors declare that they have no competing interests.