No abstract available
MeSH terms
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Adolescent
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Botulinum Toxins, Type A / administration & dosage*
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Diagnosis, Differential
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Follow-Up Studies
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Humans
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Injections, Intramuscular
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Male
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Muscle Rigidity / diagnosis
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Muscle Rigidity / drug therapy*
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Muscle Rigidity / etiology
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Neck Muscles / drug effects*