1. Faculty of Medicine; Transylvania University; Brasov Romania
2. Columbia University Medical Center; New York New York
3. School of Medicine and Public Health; University of Wisconsin; Madison Wisconsin
4. Department of Otorhinolaryngology; University Hospitals Leuven; Leuven Belgium
5. Department of Otorhinolaryngology; Academic Medical Center; Amsterdam The Netherlands
6. Wroclaw Medical University; Wrocław Poland
7. ALL-MED Medical Research Institute; Wroclaw Poland
8. Food Allergy Referral Centre; Department of Woman and Child Health; Padua University hospital; Padua Italy
9. Harvard Medical School; Boston Children's Hospital; Boston Massachusetts
10. Department of Allergy; Hospital La Paz Institute for Health Research and CIBER of Respiratory Diseases (CIBERES); Madrid Spain
11. UNC School of Medicine; Chapel Hill North Carolina