方法选择黑龙江省富裕县克山病病区慢型、潜在型克山病患者34例，健康人32例。

Methods 34 patients with KSD and 32 healthy controls were selected from the epidemic area of keshan disease.

youdao

方法选择黑龙江省富裕县克山病病区慢型、潜在型克山病患者34例，健康人32例。

Methods 34 patients with KSD and 32 healthy controls were selected from the epidemic area of keshan disease.

youdao