Early operation was performed in 2 weeks from onset, and late operation after 2 weeks.

将发病2周以内手术者定为早期手术，2周以后手术者为晚期手术。

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Early operation was performed in 2 weeks from onset, and late operation after 2 weeks.

将发病2周以内手术者定为早期手术，2周以后手术者为晚期手术。

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