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Gac. méd. Caracas
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118(2): 158-162, abr.-jun. 2010.
Article
in Spanish
| LILACS
| ID: lil-679006
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Gac. méd. Caracas
;
115(2): 160-167, abr. 2007. ilus, graf, tab
Article
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| LILACS
| ID: lil-630494