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Physiological mechanisms of rigidity in Parkinson's disease.
Berardelli A, Sabra AF, Hallett M. Berardelli A, et al. Among authors: sabra af. J Neurol Neurosurg Psychiatry. 1983 Jan;46(1):45-53. doi: 10.1136/jnnp.46.1.45. J Neurol Neurosurg Psychiatry. 1983. PMID: 6842199 Free PMC article.