No abstract available
Publication types
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Comment
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Editorial
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Randomized Controlled Trial
MeSH terms
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Humans
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Male
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Penile Erection / drug effects
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Piperazines / therapeutic use*
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Purines
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Raynaud Disease / drug therapy*
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Sildenafil Citrate
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Sulfones
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Vasodilator Agents / therapeutic use*
Substances
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Piperazines
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Purines
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Sulfones
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Vasodilator Agents
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Sildenafil Citrate