1. Fundación Hospital La Misericordia; Bogotá Colombia
2. Department of Pediatrics, School of Medicine; Universidad Nacional de Colombia; Bogotá Colombia
3. Department of Pediatric Pulmonology and Pediatric Critical Care Medicine, School of Medicine; Universidad El Bosque; Bogota Colombia
4. Division of Pediatric Pulmonary Medicine; Penn State Hershey Children's Hospital, Pennsylvania State University College of Medicine; Hershey Pennsylvania