No abstract available
MeSH terms
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Cardiotonic Agents / blood*
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Digoxin / blood*
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Heart Failure / blood
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Heart Failure / drug therapy
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Humans
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Laboratories, Hospital*
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Randomized Controlled Trials as Topic
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Reference Values
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Surveys and Questionnaires
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United States
Substances
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Cardiotonic Agents
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Digoxin