Ethics approval and consent to participate
This study was reviewed and approved by the Royal Tai Army Medical Department Institutional Review Board. Written informed consent was obtained from all participants following the WMA Declaration of Helsinki Ethics principles for medical research involving human subjects (approval number: R133h/63). The study was registered in the Thai Clinical Trials Registry and obliged to disclose details of the 24 mandatory items of the WHO International Clinical Trials Registry Platform (Trial identification number was TCTR20201020004, First submitted date: 20/10/2020).