1. Department of Gastroenterology and Hepatology, St George Hospital, Sydney, NSW, Australia
2. Speech Pathology Department, St George Hospital, Sydney, NSW, Australia
3. St George Clinical School, University of New South Wales, Sydney, NSW, Australia
4. Department of Radiation Oncology, Cancer Care Centre, St George Hospital, Sydney, NSW, Australia
5. Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins Hospital
6. Department of Otolaryngology – Head and Neck Surgery, Johns Hopkins University, Baltimore, MD, USA