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Tachypnea is a useful predictor of pneumonia in children with acute respiratory infection

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  • Source of funding: no external funding.

  • For correspondence: Dr H Martínez, Research Unit on Epidemiology and Health Services, Mexican Social Security Institute, Centro Médico Nacional Siglo XXI, Unidad de Congresos, Bloque B, 4o Piso, Avenida Cuauhtémoc 330, Col Doctores, Mexico 06725 DF. Fax +52 5 761 09 52.