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Ong CN, Sia GL, Chia SE, Phoon WH, Tan KT.Ong CN, et al.J Anal Toxicol. 1991 Jan-Feb;15(1):13-6. doi: 10.1093/jat/15.1.13.J Anal Toxicol. 1991.PMID: 2046335
Ong CN, Chia SE, Phoon WH, Tan KT, Kok PW.Ong CN, et al.Scand J Work Environ Health. 1991 Dec;17(6):430-5. doi: 10.5271/sjweh.1684.Scand J Work Environ Health. 1991.PMID: 1788536Free article.
Ong CN, Chia SE, Phoon WH, Tan KT.Ong CN, et al.Br J Ind Med. 1991 Sep;48(9):616-21. doi: 10.1136/oem.48.9.616.Br J Ind Med. 1991.PMID: 1911404Free PMC article.
Foo SC, Jeyaratnam J, Ong CN, Khoo NY, Koh D, Chia SE.Foo SC, et al. Among authors: ong cn.Am Ind Hyg Assoc J. 1991 May;52(5):212-7. doi: 10.1080/15298669191364613.Am Ind Hyg Assoc J. 1991.PMID: 1951061
Ong CN, Shi CY, Chia SE, Chua SC, Ong HY, Lee BL, Ng TP, Teramoto K.Ong CN, et al. Among authors: ong hy.Am J Ind Med. 1994 May;25(5):719-30. doi: 10.1002/ajim.4700250511.Am J Ind Med. 1994.PMID: 8030642
Sia GL, Ong CN, Chia SE, Ong HY, Phoon WH, Tan KT.Sia GL, et al. Among authors: ong cn, ong hy.Environ Monit Assess. 1991 Oct;19(1-3):401-11. doi: 10.1007/BF00401328.Environ Monit Assess. 1991.PMID: 24233956
Ong CN, Sia GL, Ong HY, Phoon WH, Tan KT.Ong CN, et al. Among authors: ong hy.Int Arch Occup Environ Health. 1991;63(5):319-24. doi: 10.1007/BF00381581.Int Arch Occup Environ Health. 1991.PMID: 1765409
Ong CN, Shen HM, Chia SE.Ong CN, et al.Toxicol Lett. 2002 Aug 5;134(1-3):17-30. doi: 10.1016/s0378-4274(02)00159-5.Toxicol Lett. 2002.PMID: 12191857Review.
Chia KS, Tan AL, Chia SE, Ong CN, Jeyaratnam J.Chia KS, et al. Among authors: ong cn.Ann Acad Med Singap. 1992 Nov;21(6):756-9.Ann Acad Med Singap. 1992.PMID: 1284195
Chia SE, Ong CN, Foo SC, Lee HP.Chia SE, et al. Among authors: ong cn.J Am Coll Health. 1992 Nov;41(3):115-9. doi: 10.1080/07448481.1992.9936310.J Am Coll Health. 1992.PMID: 1430673