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Chvapil M, Droegemueller W.Chvapil M, et al. Among authors: droegemueller w.Obstet Gynecol Annu. 1981;10:363-73.Obstet Gynecol Annu. 1981.PMID: 7024877Review.
Droegemueller W, Greer BE, Davis JR, Makowski EL, Chvapil M, Pollard A.Droegemueller W, et al.Am J Obstet Gynecol. 1978 May 1;131(1):1-9. doi: 10.1016/0002-9378(78)90466-0.Am J Obstet Gynecol. 1978.PMID: 417630