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Chan LY, Fu L, Leung TN, Wong SF, Lau TK.Chan LY, et al. Among authors: lau tk.Acta Obstet Gynecol Scand. 2004 Jan;83(1):70-4.Acta Obstet Gynecol Scand. 2004.PMID: 14678088
Chan LY, Chiu PY, Siu NS, Wang CC, Lau TK.Chan LY, et al. Among authors: lau tk.Reprod Toxicol. 2002 Nov-Dec;16(6):841-4. doi: 10.1016/s0890-6238(02)00047-3.Reprod Toxicol. 2002.PMID: 12401513