1. Department of Gastroenterology and Hepatology; St George Hospital; Sydney NSW Australia
2. St George Clinical School; University of New South Wales; Sydney NSW Australia
3. Speech Pathology Department; St George Hospital; Sydney NSW Australia
4. Department of Geriatric Medicine; The First Hospital of Lanzhou University; Lanzhou Gansu China
5. Human Physiology, Medical Science and Technology & Gastroenterology; School of Medicine; Flinders University; Adelaide SA Australia
6. Neurosciences; ExpORL - Translational Research Center for Gastrointestinal Diseases; University of Leuven; Leuven Belgium