No abstract available
MeSH terms
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Erectile Dysfunction / drug therapy*
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Forecasting
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Humans
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Male
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Phosphodiesterase Inhibitors / pharmacology
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Phosphodiesterase Inhibitors / therapeutic use*
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Piperazines / pharmacology
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Piperazines / therapeutic use*
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Purines
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Sildenafil Citrate
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Sulfones
Substances
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Phosphodiesterase Inhibitors
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Piperazines
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Purines
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Sulfones
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Sildenafil Citrate