Text and Data Mining valid from 2020-02-12
Received: 9 October 2019
Accepted: 6 February 2020
First Online: 12 February 2020
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki. Ethical approval was not required because the study was retrospective, and patients were subjected only to routine procedures provided by the department.
: Not applicable.
: The authors declare that they have no competing interests.