Funding for this research was provided by:
Faculty of Medicine, Chiang Mai University
Received: 15 April 2020
Accepted: 12 June 2020
First Online: 20 June 2020
Ethics approval and consent to participate
: This study was approved by the institutional review board and ethical committee of the Faculty of Medicine, Chiang Mai University (STUDY CODE: ORT-2560-04706). Retrospective data was used for analysis; thus, consent to participate was not applicable.
: Not applicable
: The authors declare that they have no competing interests.