Professor Yoh Zen is a Consultant Histopathologist at Institute of Liver Studies, King’s College Hospital, London, contributing to the diagnostic work of complex liver and pancreatobiliary diseases at this tertiary referral centre. He is also an international expert in IgG4-related disease. Alongside busy clinical work, he has engaged in scientific research and published 350 peer-reviewed manuscripts and 33 book chapters including review articles in the New England Journal of Medicine and the Lancet. His citation index is over 15,000 with an h-index of 70.