title: The fallout from Viagra means it is time to come clean about NHS rationing.
authors.forename: E
authors.initials: E
authors.lastname: Harris
mesh_terms: D015106:3',5'-Cyclic-GMP Phosphodiesterases / Q000037:antagonists & inhibitors*; D016527:Drug Costs; D015276:Health Care Rationing; D006801:Humans; D010879:Piperazines / Q000191:economics*; D011687:Purines; D000068677:Sildenafil Citrate; D013222:State Medicine; D013450:Sulfones; D006113:United Kingdom
chemical_list: D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate; D015106:3',5'-Cyclic-GMP Phosphodiesterases