Received: 1 October 2019
Accepted: 29 October 2019
First Online: 9 November 2019
Ethics approval and consent to participate
: This study was approved by the Ethic Committee of Ramathibodi Hospital, Mahidol University (protocol ID 10-57-07). Informed consent was waived due to the retrospective nature of the study.
: Not applicable.
: The authors declare that they have no competing interests.