Research Capsules.

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      The article offers news briefs related to drug research. Antiretroviral therapy tends to increase the average life expectancy of HIV-infected patients by 13 years. Eli Lilly and Co.'s Cialis, an erectile dysfunction drug, is said to be effective in relieving lower urinary tract symptoms. On the "Courage" study published in the "New England Journal of Medicine," angioplasty was found to have small advantage over drug treatment for patients with stable coronary disease.