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Davis LE, Lucas MJ, Hankins GD, Roark ML, Cunningham FG.Davis LE, et al. Among authors: lucas mj.Am J Obstet Gynecol. 1989 Jan;160(1):63-70. doi: 10.1016/0002-9378(89)90088-4.Am J Obstet Gynecol. 1989.PMID: 2912104