Methods: Epidemiological investigation of carcinogenic and mutagenic effects of endemic arsenism was carried out after 15 yeas of intervention.

• 方法:以皮肤癌变、内脏癌变、染色体畸变和微核率作为评价指标,对奎屯砷中毒地区改水防病干预15年后进行致癌、致突变流行病学调查研究。