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Hallak M, Johnson MP, Pryde PG, Isada NB, Zador IE, Evans MI.Hallak M, et al. Among authors: johnson mp.Obstet Gynecol. 1992 Sep;80(3 Pt 1):349-52.Obstet Gynecol. 1992.PMID: 1495690
Pryde PG, Isada NB, Hallak M, Johnson MP, Odgers AE, Evans MI.Pryde PG, et al. Among authors: johnson mp.Obstet Gynecol. 1992 Jul;80(1):52-6.Obstet Gynecol. 1992.PMID: 1603497