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Lee SS, Collins RJ, Pun TC, Cheng DK, Ngan HY.Lee SS, et al. Among authors: pun tc.Int J Gynaecol Obstet. 1998 Jan;60(1):35-40. doi: 10.1016/s0020-7292(97)00219-1.Int J Gynaecol Obstet. 1998.PMID: 9506412