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Hits 1386  Download times 1270  Received:August 15, 2004  
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DOI   10.11656/j.issn.1672-1519.2004.06.30
Key Words   
Author NameAffiliation
张宏文 天津市北辰区北门医院 天津300400 
史巡正 天津市北辰区北门医院 天津300400 
Abstract
    

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