1. Gastroenterology and Hepatology Unit, Department of Medicine, Faculty of Medicine University of Malaya Kuala Lumpur Malaysia
2. Department of Anaesthesiology, Faculty of Medicine University of Malaya Kuala Lumpur Malaysia
3. Neurology Unit, Department of Medicine, Faculty of Medicine University of Malaya Kuala Lumpur Malaysia
4. Palliative Care Unit, Department of Medicine, Faculty of Medicine University of Malaya Kuala Lumpur Malaysia