Eric Yu Hai Chen, MD (Edin), FRCPsych (UK), MB ChB (Edin), MA (Oxon), is professor of psychiatry, Lee Kong Chian School of Medicine, Nanyang Technological University, and senior consultant, Institute of Mental Health, Singapore. He is also professor emeritus, former chair professor and head of the Department of Psychiatry at the University of Hong Kong. He is internationally recognised for his work in youth mental health, early intervention of psychosis, cognition, psychopathology, and functional outcomes in psychotic disorders.