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Metals in hair as biological indices for exposure.
Foo SC, Khoo NY, Heng A, Chua LH, Chia SE, Ong CN, Ngim CH, Jeyaratnam J. Foo SC, et al. Among authors: ngim ch. Int Arch Occup Environ Health. 1993;65(1 Suppl):S83-6. doi: 10.1007/BF00381312. Int Arch Occup Environ Health. 1993. PMID: 8406944
Mercury in scalp hair of healthy Singapore residents.
Foo SC, Ngim CH, Phoon WO, Lee J. Foo SC, et al. Among authors: ngim ch. Sci Total Environ. 1988 Jun 15;72:113-22. doi: 10.1016/0048-9697(88)90010-1. Sci Total Environ. 1988. PMID: 3406725