No abstract available
MeSH terms
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Exercise Test
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Exercise Tolerance / drug effects*
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Humans
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Hypertension, Pulmonary / drug therapy*
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Hypertension, Pulmonary / physiopathology
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Male
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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
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Vasodilator Agents / pharmacology*
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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