The rise and fall of viagra.
Berger
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A
General practitioner, London.
D004791:Enzyme Inhibitors; D015276:Health Care Rationing; D006801:Humans; D008402:Mass Media; D010879:Piperazines; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones
D004791:Enzyme Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate