.[J].Chinese Journal of Radiological Medicine and Protection,1992,12(3):202-204,205
Received:July 15, 1991  
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Author NameAffiliation
孙承业 中国预防医学科学院劳动卫生与职业病研究所, 北京 100050 
丁茂柏 中国预防医学科学院劳动卫生与职业病研究所, 北京 100050 
李国维 北京朝阳医院 
范焱 北京医科大学第一医院 
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