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Tan CS, Chin XY, Chng ST, Lee J, Ooi CS.Tan CS, et al. Among authors: ooi cs.Int J Environ Res Public Health. 2022 Sep 19;19(18):11841. doi: 10.3390/ijerph191811841.Int J Environ Res Public Health. 2022.PMID: 36142114Free PMC article.Clinical Trial.
Yong HS, Chiang GL, Loong KP, Ooi CS.Yong HS, et al. Among authors: ooi cs.Southeast Asian J Trop Med Public Health. 1988 Dec;19(4):681-7.Southeast Asian J Trop Med Public Health. 1988.PMID: 3238481