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Lessing JB, Peyser MR, Gilad S, Amit A, Kogosowski A, Yovel I, Barak Y, David MP.Lessing JB, et al.Fertil Steril. 1987 Sep;48(3):450-3. doi: 10.1016/s0015-0282(16)59416-3.Fertil Steril. 1987.PMID: 3114012Free article.