Methods We applied genetic epidemiological study.
方法遗传流行病学研究。
Methods Epidemiological field research method was adopted to study it.
方法通过现场流行病学方法进行调查。
METHODS We adopted Epidemiological Field Research method to study it.
方法采用流行病学现场研究方法进行研究。
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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