Funding for this research was provided by:
the 90th Anniversary of Chulalongkorn University (RA61/104)
the Research Chair Grant from the National Science and Technology Development Agency
the 100th Anniversary of Chulalongkorn University Fund for Doctoral Scholarship
the Overseas Research Experience Scholarship for Graduate Student, Thailand and China Scholarship Council, China
Text and Data Mining valid from 2019-12-21
Received: 27 June 2019
Accepted: 8 September 2019
First Online: 21 December 2019
Compliance with ethics guidelines
: Dong ZHAN, Aree TANAVALEE, Saran TANTAVISUT, Srihatach NGARMUKOS, Steven W. EDWARDS, and Sittisak HONSAWEK declare that they have no conflict of interest.
: The study protocol conformed to the ethical standards outlined in the Declaration of Helsinki of 1975, as revised in 2008 (5) and was approved by the Ethical Committee on Human Research of the Faculty of Medicine, Chulalongkorn University, Thailand. All study subjects were fully informed of the study protocol and procedures prior to participating in the study. Written informed consent was obtained from all participants before any procedures were performed.