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河北省的克山病、大骨节病病区分布于河北省最北部的张家口、承德两地区,共有12个县发病。采用流行病学对比调查方法,在全省病区和非病区14个县共选34个村做为调查点,对其内、外环境采
Keshan disease and Kashin-Beck disease in Hebei Province are located in Zhangjiakou and Chengde, the northern part of Hebei Province, with a total of 12 counties. Epidemiological comparative survey method, in the province’s ward and non-ward 14 counties selected 34 villages as a survey point, its internal and external environment mining