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In the editorial titled "Voluntary Male Sterilization," published in the May 27 issue, the final statement in the fifth paragraph (p 822, lines 27-29) reads: "... if the ejaculate contains no semen six months to a year after vasectomy, sterilization is presumably complete." The word "semen" properly should have read "sperm."
Vasectomy: Semen, No Sperm. JAMA. 1968;206(2):369. doi:10.1001/jama.1968.03150020085022