1. Department of PediatricsSchool of Medicine, Universidad Nacional de Colombia Bogota Colombia
2. Department of Pediatric Pulmonology and Pediatric Critical Care MedicineSchool of Medicine, Universidad El Bosque Bogota Colombia
3. Department of Internal MedicineSchool of Medicine, Universidad Nacional de Colombia Bogotá Colombia
4. Department of Pediatric PulmonologySchool of Medicine, Pontificia Universidad Catolica de ChileSantiago Chile