Funding for this research was provided by:
Received: 6 March 2018
Accepted: 30 May 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: This study was approved by the Committee on Human Rights Related to Research Involving Human Subjects’ Faculty of Medicine, Ramathibodi Hospital, Mahidol University, and the Ethics Committee of Vichaiyut Hospital. The written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.