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Wiqvist N, Bygdeman M, Kwon SU, Mukherjee T, Roth-Brandel U.Wiqvist N, et al.Am J Obstet Gynecol. 1968 Oct 1;102(3):327-32. doi: 10.1016/0002-9378(68)90002-1.Am J Obstet Gynecol. 1968.PMID: 5675883