HealthDay
"Erectile dysfunction [ED] is frequently a manifestation of underlying cardiovascular problems. It even precedes angina -- it can be an early warning, in that respect," said Dr. Andrew McCullough, director of male sexual health, fertility and microsurgery at New York University School of Medicine in New York City.
The advent of Viagra, Cialis and Levitra has put the research spotlight back on ED, and a series of studies are suggesting that, for most men, the condition has physiological, not psychological, origins.
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