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Rev. Fac. Med. UNAM
;
44(1): 38-41, ene.-feb. 2001. CD-ROM
Article
in Spanish
| LILACS
| ID: lil-314357
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Gac. méd. Méx
;
137(1): 53-57, ene.-feb. 2001. ilus
Article
in Spanish
| LILACS
| ID: lil-310669