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Hits 1472  Download times 1050  Received:November 26, 1999  
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DOI   10.11656/j.issn.1672-1519.2000.03.32
Key Words   
Author NameAffiliation
吴俊贞 天津职工医学院 30052 
宋博毅 华北煤矿医学院附属医院 063000 
李广琴 华北煤矿医学院附属医院 063000 
Abstract
    

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