No abstract available
MeSH terms
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Analgesics / therapeutic use
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Diagnosis, Differential
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Diagnostic Imaging / standards
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Emergency Medical Services / methods*
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Headache Disorders / classification*
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Headache Disorders / diagnosis*
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Headache Disorders / therapy
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Humans
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Neurologic Examination / methods
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Neurologic Examination / standards
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Neurology / methods*