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free samples viagra where to buy viagra without prescription All of these conditions or lifestyle factors contribute to erectile difficulties in three major ways: By reducing blood flow, causing nerve damage, or changing the hormonal environment. "We were able to show the tissue was able to integrate and function in the long term, which means we can start planning clinical applications [in humans]," said Dr. Anthony Atala, director of the Institute for Regenerative Medicine at Wake Forest University Baptist Medical Center and senior author of the study. "Our hope is to be able to treat patients with many conditions, including congenital abnormalities of the penis, traumatic injuries, penile cancer and severe cases of erectile dysfunction that don't benefit from drug treatments." Related Health News By E.J. Mundell HealthDay Reporter

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