title: Erectile dysfunction in the Africa/Middle East Region: epidemiology and experience with sildenafil citrate (Viagra).
authors.forename: I M
authors.initials: IM
authors.lastname: Khalaf
authors.forename: I P
authors.initials: IP
authors.lastname: Levinson
mesh_terms: D000349:Africa / Q000453:epidemiology; D007172:Erectile Dysfunction / Q000188:drug therapy* / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008877:Middle East / Q000453:epidemiology; D010879:Piperazines / Q000627:therapeutic use*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones; D014665:Vasodilator Agents / Q000627:therapeutic use*
chemical_list: D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014665:Vasodilator Agents; D000068677:Sildenafil Citrate