Funding for this research was provided by:
Received: 22 June 2020
Accepted: 2 October 2020
First Online: 8 October 2020
Ethics approval and consent to participate
: This study was approved by the Vajira Institution Review Board (certificate of approval no.138/2561). Permission to access the data was granted by the dean of the Faculty of Medicine Vajira Hospital.
: Not Applicable.
: All authors declare that they have no competing interest.