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Lopes A, King PA, Duthie SJ, To WK, Ma HK.Lopes A, et al. Among authors: duthie sj.Aust N Z J Obstet Gynaecol. 1991 Feb;31(1):41-3. doi: 10.1111/j.1479-828x.1991.tb02762.x.Aust N Z J Obstet Gynaecol. 1991.PMID: 1872772
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