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The improvement of PD-related motor symptoms after acute levodopa challenge test. (a, b) The improvement of UPDRS III score and improvement rate of all patients with PD. (c, d) The improvement of UPDRS III score and improvement rate of patients with PD in levodopa good response group. (e, f) The improvement of UPDRS III score and improvement rate of patients with PD in levodopa poor response group.
