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| Format: | Article |
| Language: | English |
| Published: |
Universidade de São Paulo
1993-01-01
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| Series: | Revista de Saúde Pública |
| Online Access: | http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S0034-89101993000400012 |
| ISSN: | 0034-8910 1518-8787 |
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