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By Zerpa Olga Ulrich Marian Borges Rafael Rodríguez Vestalia Centeno Marta Negrón Emilia Belizario Doris Convit Jacinto in Revista Panamericana de Salud Pública/Pan American Journal of Public Health
ISSN:1020-4989|13|4|239-245
Pan American Health Organization (PAHO)(2003)
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