title: Re: A Prospective, Randomized, Placebo-Controlled Trial of On-Demand vs. Nightly Sildenafil Citrate as Assessed by RigiScan and the International Index of Erectile Function.
authors.forename: Allen D
authors.initials: AD
authors.lastname: Seftel
mesh_terms: D004311:Double-Blind Method; D007172:Erectile Dysfunction; D006801:Humans; D008297:Male; D010410:Penile Erection; D058986:Phosphodiesterase 5 Inhibitors; D011446:Prospective Studies; D000068677:Sildenafil Citrate; D016896:Treatment Outcome
chemical_list: D058986:Phosphodiesterase 5 Inhibitors; D000068677:Sildenafil Citrate