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. Pediatric Respiratory and Allergy Units, "Virgen de la Arrixaca" University Children's Hospital, University of Murcia, and IMIB Research Institute, Murcia, Spain.
4. Department of Pediatrics, Hospital de Clínicas, Federal University of Paraná (UFPR), Curitiba, Brazil.
5. Pediatric Asthma Prevention Program (PIPA), Uruguaiana, Brazil.
6. Hospital de Niños "Ricardo Gutiérrez", Buenos Aires, Argentina.
7. Escuela de Medicina, Universidad Industrial de Santander, Bucaramanga, Colombia.
8. Section of Allergy and Clinical Immunology, British American Hospital, Lima, Peru.
9. Hospital de Base de São José do Rio Preto, Faculty of Medicine of Sao José do Rio Preto, São Paulo, Brazil.
10. Department of Pediatrics, Federal University of Mato Grosso, Cuiaba, Brazil.
11. Clínica Pediátrica "B". Hospital Pereira Rossell, Facultad Medicina, Universidad de la Republica, Montevideo, Uruguay.