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Gac. méd. Méx
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131(3): 303-16, mayo-jun. 1995.
Article
in Spanish
| LILACS
| ID: lil-174058
2.
Gac. méd. Méx
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127(2): 207-10, mar.-abr. 1991.
Article
in Spanish
| LILACS
| ID: lil-175320
3.
Cir. & cir
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53(6): 24-5, nov.-dic.1987.
Article
in Spanish
| LILACS
| ID: lil-134782