1. Department of Pediatrics; School of Medicine; Universidad Nacional de Colombia; Bogota Colombia
2. Department of Pediatric Pulmonology and Pediatric Critical Care Medicine; School of Medicine; Universidad El Bosque; Bogota Colombia
3. Research Unit; Military Hospital of Colombia; Bogota Colombia
4. Department of Internal Medicine; School of Medicine; Universidad Nacional de Colombia; Bogota Colombia
5. Department of Pediatric Pulmonology; Hospital Militar Central; Bogota Colombia
6. Department of Pediatrics; School of Medicine; Universidad Militar Nueva Granada; Bogota Colombia