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[This retracts the article on p. 223 in vol. 34, PMID: 20049300.][This retracts the article on p. 156 in vol. 33, PMID: 19876475.].
[本文撤回发表于第34卷第223页,PMID: 20049300的文章。][本文撤回发表于第33卷第156页,PMID: 19876475的文章。]