1. Ear, Nose, and Throat Department, Dubai Hospital, Dubai, United Arab Emirates
2. Department of Otolaryngology–Head and Neck Surgery, American University, Beirut, Lebanon
3. Medicine and Allergy Department, Cairo University, Cairo, Egypt
4. Allergy and Clinical Immunology, Children's Medical Center Hospital, Tehran, Iran
5. Ear, Nose and Throat, Magrabi Eye & Ear Hospital, Jeddah, Saudi Arabia
6. Ear, Nose and Throat, Welcare Hospital, Dubai, United Arab Emirates
7. Ear, Nose and Throat, Hotel Dieu de France, Beirut, Lebanon
8. Department of Immunology, Cairo University, Cairo, Egypt
9. Department of Otorhinolaryngology Head and Neck Surgery, Ain-Shams University, Cairo, Egypt
10. Department of Otorhinolaryngology, Head and Neck Surgery, Sadi Hospital, Esfahan, Iran
11. Ear, Nose and Throat, Riyadh National Hospital (Ministry of Social Insurance Hospital), Riyadh, Saudi Arabia
12. Head of Ear, Nose, and Throat Department, Sacré Coeur Hospital, Beirut, Lebanon Funded by Takeda Pharmaceutical Company Limited