Received: 5 May 2020
Accepted: 21 June 2020
First Online: 2 July 2020
Ethics approval and consent to participate
: The Institutional Review Board and the Ethics Committee of Hat Yai Hospital (protocol number 33/2561) and the Faculty of Medicine, Thammasat University (MTU-EC-ES-0-061/61) approved the study protocol. The requirement for informed consent was waived as the data were retrospectively collected and were anonymous.
: Not applicable.
: The authors declare no competing interests.