Objective: To explore the method of classifying endemic fluorosis region.
前言：目的：探讨地方性氟中毒病区分类方法。
The downstream region of the Yellow River in Shandong province is serious illness area of endemic fluorosis.
山东省黄河下游流域是山东省高碘地甲病重病区。
The downstream region of the Yellow River in Shandong province is serious illness area of endemic fluorosis.
山东省黄河下游流域是山东省高碘地甲病重病区。
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