1. Pediatric Unit Foundation IRCCS Ca' Granda Ospedale Maggiore Policlinico Milan Italy
2. Department of Clinical Science and Community Health University of Milan Milan Italy
3. Department of Nutritional Sciences and Dietetics International Hellenic University Thessaloniki Greece
4. Department of Allergy and Clinical Immunology 424 General Military Training Hospital Thessaloniki Greece
5. Allergy Department 2nd Pediatric Clinic, University of Athens Athens Greece
6. Department of Pharmacology, Toxicology and Clinical Pharmacology “Iuliu Hațieganu” University of Medicine and Pharmacy Cluj Napoca Romania
7. Department of Medicine Democritus University of Thrace Alexandroupolis Greece
8. Department of Clinical Science and Education Södersjukhuset Karolinska Institutet Stockholm Sweden
9. Sachs' Children and Youth Hospital, Södersjukhuset Stockholm Sweden
10. Department of Pediatrics OLVG Hospital Amsterdam The Netherlands
11. Rijnstate Allergy Centre Rijnstate Hospital Arnhem The Netherlands
12. Section of Allergy and Immunology, Department of Pediatrics, Children's Hospital Colorado University of Colorado School of Medicine Aurora Colorado USA
13. Department of Medicine and School of Microbiology, APC Microbiome Ireland University College Cork Cork Ireland