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Chiang VC, Wong HT, Yeung PC, Choi YK, Fok MS, Mak OI, Wong HY, Wong KH, Wong SY, Wong YS, Wong EY.Chiang VC, et al. Among authors: fok ms.Int J Environ Res Public Health. 2016 May 11;13(5):486. doi: 10.3390/ijerph13050486.Int J Environ Res Public Health. 2016.PMID: 27187424Free PMC article.