Professor Hadzic is a professor of paediatric hepatology with over 20 years of experience in the paediatric liver service. He runs active research programs focusing on biliary atresia, alpha-1 antitrypsin deficiency, metabolic liver disorders, autoimmune liver disease, and paediatric liver transplantation. Professor Hadzic serves on several international editorial boards and government advisory committees and has published over 200 papers, reviews, and book chapters. His expertise includes paediatric hepatology, biliary atresia, metabolic liver disorders, autoimmune liver disease, and liver transplantation.