Efficacy and safety of oral sildenafil citrate (Viagra®) in the treatment of male erectile dysfunction in Colombia, Ecuador, and Venezuela: a double-blind, multicenter, placebo-controlled study

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F. Gómez, & H. Dávila, & André Carvalho Costa, & Antonio Acuña, & Luis Alfredo Wadskier, & Pilarcita Alvarez Plúa, & on behalf of the Andean Group of Erectile Dysfunction Study (2002). Efficacy and safety of oral sildenafil citrate (Viagra®) in the treatment of male erectile dysfunction in Colombia, Ecuador, and Venezuela: a double-blind, multicenter, placebo-controlled study. https://doi.org/10.1038/sj.ijir.3900897