Dr Khoo Kay Leong completed his Basic and Advanced Specialty Training in Singapore. In 2002, he underwent interventional pulmonary training at both Center Laser, Saint Marguerite's Hospital in Marseille and Canisius Wilhelmina Hospital in Nijmegen. Dr Khoo is the Clinical Director of the Division of Respiratory & Critical Care Medicine and also teaches at the Yong Loo Lin School of Medicine, National University of Singapore. His professional affiliations include memberships of the American College of Chest Physicians and the Singapore Thoracic Society.