Professor of Paediatrics and Chairman, Department of Paediatrics
Assistant Dean (Student Affairs), Faculty of Medicine, 
The Chinese University of Hong Kong, Shatin, Hong Kong
Honorary Consultant, Department of Paediatrics, Prince of Wales Hospital
Person-in-charge of the Respiratory and Sleep Medicine Service in the Department of Paediatrics, Prince of Wales Hospital
Associate editor of Frontiers in Paediatric Pulmonology and Respirology
Vice-chairperson of the Asia Pacific Paediatric Sleep Alliance
Published over 220 peer-reviewed articles