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1by Werner Apt, Carlos Pérez, Ercira Galdamez, Sergio Campano, Flavio Vega, Danilo Vargas, Jorge Rodríguez, Clara Retamal, Pedro Cortés, Inés Zulantay, Paul H. de RyckeGet access
Published in Revista Panamericana de Salud Pública (2000)
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Article in Journal/Newspaper