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Correspondencia a:
Dr. Guillermo Zepeda F.
Profesor Asistente
Depto. de Pediatría y Cirugía Infantil,
Facultad de Medicina, Campus Norte,
Universidad de Chile.
Hospital Roberto del Río. Santiago de Chile.
Email:
gezepeda@med.uchile.clG. Zepeda F. et al.
Rev Chil Enferm Respir 2016; 32: 18-24