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Chesson HW, Blandford JM, Gift TL, Tao G, Irwin KL.Chesson HW, et al.Perspect Sex Reprod Health. 2004 Jan-Feb;36(1):11-9. doi: 10.1363/psrh.36.11.04.Perspect Sex Reprod Health. 2004.PMID: 14982672Review.