title: Viagra! Are we ready?
authors.affiliation: Toronto Hospital. michael.evans@utoronto.ca
authors.forename: M F
authors.initials: MF
authors.lastname: Evans
mesh_terms: D015106:3',5'-Cyclic-GMP Phosphodiesterases / Q000037:antagonists & inhibitors*; D000284:Administration, Oral; D007172:Erectile Dysfunction / Q000188:drug therapy* / Q000209:etiology; D005194:Family Practice; D006801:Humans; D008297:Male; D010879:Piperazines / Q000627:therapeutic use*; D011687:Purines; D012107:Research Design; D000068677:Sildenafil Citrate; D013450:Sulfones
chemical_list: D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate; D015106:3',5'-Cyclic-GMP Phosphodiesterases