1. Division of Rhinology, Department of Otolaryngology, Ambulatory Care Center (ACC), Hamad Medical Corporation (HMC), Doha, Qatar
2. Department of Otolaryngology – Head and Neck Surgery, Ng Teng Fong General Hospital, National University Health System, Singapore, Singapore
3. Department of Otolaryngology – Head and Neck | Facial Plastic and Reconstructive Surgery, Canterbury Christchurch University, Canterbury, United Kingdom