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Ong SG, Lam TH, Wong CM, Chow WK, Ma PL, Lam SK, O'Kelly FJ.Ong SG, et al. Among authors: lam sk, lam th.Am J Ind Med. 1987;12(6):773-7. doi: 10.1002/ajim.4700120618.Am J Ind Med. 1987.PMID: 3434568
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Wong CM, Lam TH, Peters J, Hedley AJ, Ong SG, Tam AY, Liu J, Spiegelhalter DJ.Wong CM, et al. Among authors: lam th.J Epidemiol Community Health. 1998 Sep;52(9):571-8. doi: 10.1136/jech.52.9.571.J Epidemiol Community Health. 1998.PMID: 10320858Free PMC article.