1. Department of Pediatric Respiratory Medicine, Hospital El Pino, University of Santiago de Chile (USACH), Santiago, Chile
2. Division of Allergy, Clinical Immunology and Rheumatology, Department of Pediatrics, Federal University of São Paulo (UNIFESP), São Paulo, Brazil
3. Department of Pediatric Allergy, Federal University of Paraná, Curitiba, Brazil
4. University of Murcia and Arrixaca Bio-Health Research Institute of Murcia (IMIB), Murcia, Spain