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Pang SM, Leung DT, Leung TY, Lai CY, Lau TK, Chung TK.Pang SM, et al. Among authors: leung dt, leung ty.Hong Kong Med J. 2007 Apr;13(2):100-5.Hong Kong Med J. 2007.PMID: 17406036Free article.
Leung TY, Stuart O, Sahota DS, Suen SS, Lau TK, Lao TT.Leung TY, et al.BJOG. 2011 Mar;118(4):474-9. doi: 10.1111/j.1471-0528.2010.02834.x. Epub 2010 Dec 24.BJOG. 2011.PMID: 21199293