Professor Justin Wu is the  President of Asian Pacific Association of Gastroenterology, Scientific Chairman of Asia Neurogastroenterology and Motility Association, and the Past President of Hong Kong Society of Gastroenterology. 
He has research focus in functional GI disorder and gastroesophageal reflux disease with more than 300 papers published in journals including New England Journal of Medicine, Lancet, Gastroenterology and Gut.