Epidemiological investigation; anxiety disorders; prevalence; risk factor.
流行病学调查；焦虑障碍；患病率；危险因素。
Epidemiological investigation was made on site; the data was collected and analyzed.
方法采用现场流行病学调查分析，并对收集的数据进行常规统计学处理。
Methods Epidemiological, clinic, and laboratory investigation were made.
方法采用流行病学调查及临床、实验室检测。
Methods Epidemiological, clinic, and laboratory investigation were made.
方法采用流行病学调查及临床、实验室检测。
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