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Blickstein I, Goldman RD, Smith-Levitin M, Greenberg M, Sherman D, Rydhstroem H.Blickstein I, et al. Among authors: rydhstroem h.Obstet Gynecol. 1999 Jan;93(1):113-6. doi: 10.1016/s0029-7844(98)00343-3.Obstet Gynecol. 1999.PMID: 9916967