Text and Data Mining valid from 2019-11-07
Received: 9 September 2019
Accepted: 31 October 2019
First Online: 7 November 2019
Compliance with ethical standards
: The authors declare no conflict of interest related to this article. The results presented in this paper have not been published previously in whole or part, except in abstract format.
: The Institutional Review Board of the Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand, has exempted this study in compliance with the International guidelines for human research protection as Declaration of Helsinki, The Belmont Report, CIOMS Guideline, International Conference on Harmonization in Good Clinical Practice (ICP-GCP) and 45CFR 46.101(b). (IRB No. 432/62).
: This study did not directly involve with human participants or animal subjects.