title: First-line therapies for erectile dysfunction.
authors.affiliation: Urology Clinic of Utah Valley, Provo, Utah, USA.
authors.forename: C
authors.initials: C
authors.lastname: Ensign
mesh_terms: D015106:3',5'-Cyclic-GMP Phosphodiesterases / Q000037:antagonists & inhibitors; D007172:Erectile Dysfunction / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*; D012739:Gonadal Steroid Hormones / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D010410:Penile Erection / Q000502:physiology; D010726:Phosphodiesterase Inhibitors / Q000627:therapeutic use*; D010879:Piperazines / Q000627:therapeutic use*; D011687:Purines; D012307:Risk Factors; D000068677:Sildenafil Citrate; D013450:Sulfones; D013739:Testosterone / Q000627:therapeutic use*
chemical_list: D012739:Gonadal Steroid Hormones; D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D013739:Testosterone; D000068677:Sildenafil Citrate; D015106:3',5'-Cyclic-GMP Phosphodiesterases