Methods To contrast the disparity of soil type, soil use, and basic characteristics, in particular microelement contents in high_mortality area and low_mortality area of esophageal cancer.
方法对比食管癌高、低死亡率区土壤类型、利用方式及土壤一般特性，尤其是在微量元素含量上的差异。
Methods Serum contents of TNF (with RIA), SA and SIL-2R (with ELISA) were measured in 38 patients with esophageal cancer both before and after treatment as well as in 35 controls.
方法：应用放射免疫分析和分光光度计法对38例食管癌患者进行了治疗前后血清tnf、SA、SIL - 2r含量检测。并以35名正常健康人作比较。
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