Tadalafil in the Treatment of Erectile Dysfunction

Erectile dysfunction (ED) refers to the inability of a man to achieve or maintain an erection that is sufficient for his sex-ual needs or the needs of his partner. 1 ED affects 150 million men worldwide, including an estimated 15 to 30 million men in the U.S.2,3 The incidence of the disorder increases with age. Chronic ED ................
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