 Study design
 This study was a parallel-group, single-blinded (outcomes assessor), randomized controlled trial. The study was approved by the Secretariat for Research and Ethics of Universiti Kebangsaan Malaysia (UKM PPI/111/8/JEP-2017-021) and Medical Research Ethics Committee of Universiti Malaya Medical Centre (MREC ID: 2020102-9129) in compliance with the Declaration of Helsinki (1975). The study protocol was designed according to the Consolidated Standards of Reporting Trials (CONSORT) guidelines. This trial was registered with the Australian New Zealand Clinical Trials Registry (ACTRN12618001434280).