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Brar S, Tang S, Drummond N, Palacios-Derflingher L, Clark V, John M, Ross S.Brar S, et al. Among authors: tang s.J Obstet Gynaecol Can. 2009 Aug;31(8):708-716. doi: 10.1016/S1701-2163(16)34274-8.J Obstet Gynaecol Can. 2009.PMID: 19772702
Lier D, Robert M, Tang S, Ross S.Lier D, et al. Among authors: tang s.BJOG. 2017 Aug;124(9):1431-1439. doi: 10.1111/1471-0528.14227. Epub 2016 Aug 10.BJOG. 2017.PMID: 27506185Clinical Trial.