A historical cohort study on the effect of drinking water improvement to the mortality of esophageal carcinoma among Linzhou residents

2007

林州市1964年通过红旗渠引浊漳河水,全市79%的居民饮用渠水,随着渠水水量减少和污染,80年代开始分批大规模改水改厕,为了检验改水降低食管癌发病率、死亡率效果,进行了改水前后对比研究。

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