对美国食品药品管理局和英国药品与保健品管理局(the UK Medicines and Healthcare products Regulatory Agency)而言，证据足够充分可靠了，因为这两个机构去年批准可用肉毒杆菌素治疗慢性偏头痛。

Solid enough for the US Food and Drug Administration and the UK Medicines and Healthcare products Regulatory Agency: both bodies approved the therapy for chronic migraine last year.

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