1. Allergy Department Hospital los Madroños Brunete Spain
2. Usher Institute University of Edinburgh Edinburgh UK
3. University Hospitals Southampton Southampton UK
4. Division of Paediatric allergy University of Cape Town Cape Town South Africa
5. Pediatric Allergy Unit H.U. Virgen de las Nieves Granada Spain
6. Santa Bárbara Health Center Toledo Spain
7. Primary Care and Population Sciences University of Southampton Southampton UK
8. Department of Paediatrics and Child Health University College Cork, Cork, Ireland.
9. Cork University Hospital, Irish Centre for Maternal and Child Health Research (INFANT) Cork Ireland
10. Department of Applied Mathematics and Statistics CEU San Pablo University Madrid Spain
11. Allergy and Immunology Unit ASST Grande Ospedale Metropolitano Niguarda Milan Italy
12. Asl Rm1, Italian National Health System Rome Italy