1. Department of Otolaryngology Head and Neck Surgery Wollongong Hospital Wollongong New South Wales Australia
2. Department of Otorhinolaryngology New Territories West Cluster, Hospital Authority Hong Kong
3. Department of Neurosurgery Wollongong Hospital Wollongong New South Wales Australia
4. Graduate School of Medicine University of Wollongong Wollongong New South Wales Australia
5. Department of Otolaryngology, Head and Neck Surgery The Canterbury Hospital Campsie New South Wales Australia
6. Dr Liang Voice Program, Faculty of Medicine and Health University of Sydney New South Wales Australia
7. Illawarra ENT Head and Neck Clinic Wollongong New South Wales Australia