No abstract available
MeSH terms
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Adult
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Aged
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Analgesics / therapeutic use*
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Attitude to Health*
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Clinical Trials as Topic*
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Drugs, Investigational
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Ethics Committees, Research
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Evaluation Studies as Topic
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Humans
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Motivation
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Pain / drug therapy
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Research Design*
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Research Subjects*
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Risk Assessment*
Substances
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Analgesics
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Drugs, Investigational