The Ethics Committee of the Institutional Review Board at Chulalongkorn University, Bangkok, Thailand, reviewed and approved the study in accordance with the Declaration of Helsinki (1989) of the World Medical Association (IRB No.: 424/59). The study was registered with the Thai Clinical Trial Registry as TCTR20161025001 on 31 October 2016 (Additional files 1 and 2: Supplementary data 1 and 2). All patients enrolled in this study provided written informed consent and consent for publication.
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