1 Department of Head and Neck Surgery, Singapore General Hospital and National Cancer Centre, Singapore and Duke National University of Singapore (NUS) Medical School, Singapore, Singapore.
2 Head and Neck Oncology, Sri Shankara Cancer Hospital and Research Centre, Bengaluru, India.
3 Unit of Otorhinolaryngology - Head and Neck Surgery, ASST Spedali Civili of Brescia, Department of Surgical and Medical Specialties, Radiological Sciences and Public Health, University of Brescia, School of Medicine, Brescia, Italy.