- Fellow and Member of the American Gastroenterological Association (AGAF)
- Previous Professor of Medicine, Dept of Medicine, National University of Singapore
- Fellow of the Royal College of Physicians, Edinburgh (FRCP (Edinburgh))
- Member of the International Association for the Study of Pain (IASP)
- Member of the American Neurogastroenterology and Motility Society / Funktional Brain-Gut Research Group
- Member of the Society for Neuroscience (SNF)
- Partner bei h-care