Pranavkumar Shivakumar, Ph.D. and Jorge Bezerra, M.D, Cincinnati Children's Hospital Medical Center (image) Cincinnati Children's Hospital Medical Center Share Print E-Mail Caption Pranavkumar Shivakumar, Ph.D., (standing), and Jorge Bezerra, M.D., of Cincinnati Children's Hospital Medical Center, analyze a bile duct tissue sample from a 7-day-old mouse. Their study in the Journal of Clinical Investigation links an over-reactive response by natural killer cells in the immune system to the onset of biliary atresia in infants, a disease in which blocked bile ducts can cause severe liver damage and death. Credit Cincinnati Children's Hospital Medical Center Usage Restrictions With credit Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.