,et al.[J].Chinese Journal of Radiological Medicine and Protection,2002,22(6):445-446
Received:October 17, 2001  
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Author NameAffiliation
陈大伟 130021 长春, 吉林大学公共卫生学院 
刘春生 吉林大学第一临床学院 
贺强 130021 长春, 吉林大学公共卫生学院 
孙跃东 东北师范大学继续教育学院 
龚守良 130021 长春, 吉林大学公共卫生学院 
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