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Phosphodiesterase type 5 inhibitors (PDE5-Is) are currently the first-line therapy for erectile dysfunction (ED), but available studies investigating the comparative effects of different PDE5-Is are limited.To compare the efficacy and safety of different classes of oral PDE5-Is for ED.A systematic search was performed in PubMed, Cochrane Library, and Embase to identify randomized controlled trials...
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