Text and Data Mining valid from 2019-12-01
Received: 30 August 2019
Accepted: 5 December 2019
First Online: 12 December 2019
Ethics approval and consent to participate
: This study was approved by the research and ethics committee, identification number UG-REC-020, and a waiver for informed consent was obtained before patient file abstraction.
: Not applicable.
: The authors declare that they have no competing interests.