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Efficacy of control of seizure frequency after treatment with transcutaneous vagus nerve stimulation (tVNS). (A) Percentage of seizure reduction over time. (B) Curative effect classification (treatment for three months): Grade I, and Grade II: 0 cases; Grade III: 5 cases; Grade IV: 12 cases. (C) Curative efficacy classification (treatment for six months): Grade I: 4 cases; Grade II: 3 cases; Grade III: 4 cases; Grade IV: 6 cases.
