title: Happy birthday Viagra.
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Muench
mesh_terms: D007172:Erectile Dysfunction / Q000188:drug therapy*; D049673:History, 20th Century; D006801:Humans; D008297:Male; D015917:Penile Prosthesis; D058986:Phosphodiesterase 5 Inhibitors / Q000266:history / Q000627:therapeutic use*; D010879:Piperazines / Q000266:history / Q000627:therapeutic use*; D011687:Purines / Q000266:history / Q000627:therapeutic use; D000068677:Sildenafil Citrate; D013450:Sulfones / Q000266:history / Q000627:therapeutic use*
chemical_list: D058986:Phosphodiesterase 5 Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate