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Perinatol. reprod. hum
;
15(1): 1-10, ene.-mar. 2001.
Article
in Spanish
| LILACS
| ID: lil-312329
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Perinatol. reprod. hum
;
12(3): 122-6, jul.-sept. 1998.
Article
in Spanish
| LILACS
| ID: lil-241507