Research focused on clinical and epidemiological aspects of stroke, cardiovascular disease and aged care. Professor of Neurology and Epidemiology, Faculty of Medicine, UNSW Sydney, and in clinical practice at Royal Prince Alfred Hospital, Sydney. Executive Director of The George Institute for Global Health, China at Peking University Health Science Center, Beijing. Senior Investigator Fellow of the National Health and Medical Research Council of Australia. Past President of the Asia Pacific Stroke Organization and the Stroke Society of Australasia.