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3Published in Revista Panamericana de Salud Pública (1997)Get access
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7Published in Revista Panamericana de Salud Pública (2000)Get access
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11Published in Revista Panamericana de Salud Pública (1999)Get access
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15Published in Revista Panamericana de Salud Pública (2002)Get access
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17Published in Revista Panamericana de Salud Pública (2000)Get access
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18Published in Revista Panamericana de Salud Pública (1997)Get access
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