1. Section of Pediatric Pulmonology Fundacion Neumologica Colombiana Bogotá Colombia
2. Pediatric Department, School of Medicine University of La Sabana Bogotá Colombia
3. Department of Pediatric Fundación Cardioinfantil‐Instituto de Cardiologia Bogotá Colombia
4. Department of Pulmonology Fundacion Neumologica Colombiana Bogotá Colombia
5. Department of Epidemiology and Biostatistics, School of Medicine University of La Sabana Bogotá Colombia
6. Novartis de Colombia Colombia
7. School of Medicine, University of La Sabana Bogotá Colombia