title: From the National Institutes of Health.
authors: National Institutes of Health, Bethesda, MD 20892.
authors: B
authors: B
authors: Healy
mesh_terms: D006801:Humans; D008297:Male; D009316:National Institutes of Health (U.S.); D011471:Prostatic Neoplasms / Q000209:etiology; D014481:United States; D014659:Vasectomy / Q000009:adverse effects / Q000592:standards*