Dr. John Granton is a Professor of Medicine, in the Faculty of Medicine at the University of Toronto. He specializes in pulmonary hypertension and critical care. His research interests include pulmonary hypertension, pulmonary embolic disease, exercise physiology, and heart-lung interactions. He is the Head of Respirology at the University Health Network and Sinai Health System. He is the current President of the Canadian Thoracic Society.