1. Department of Pediatric Pulmonology and Cardiology, Division of Pediatrics, School of Medicine Pontificia Universidad Católica de Chile Santiago Chile
2. Department of Pediatrics, School of Medicine Universidad Nacional de Colombia Bogota Colombia
3. Department of Internal Medicine Universidad Nacional de Colombia Bogotá Colombia
4. Department of Pediatric Pulmonology and Pediatric Critical Care Medicine, School of Medicine Universidad El Bosque Bogota Colombia