Text and Data Mining valid from 2020-04-21
Received: 5 September 2019
Accepted: 27 March 2020
First Online: 21 April 2020
Ethics approval and consent to participate
: The study was approved by the Ethical Committee of NUSM. No informed consent was required because this was a retrospective observational study using anonymized archived data from a clinical database and did not compromise anonymity or confidentiality.
: Not applicable.
: The authors declare that they have no competing interest.