Grigorios I. Leontiadis

Associate Professor, Department of Medicine, Division of Gastroenterology,
McMaster University Hamilton, Ontario, Canada

Contact details
Telephone: 905 521 2100 Ext 73836
Email: leontia(@)


Dr Grigorios Leontiadis qualified from Aristotle University of Thessaloniki, Greece in 1992 and trained in Gastroenterology in Greece (Papanikolaou Hospital, Thessaloniki) and in the UK (Royal Albert Infirmary, Wigan and Queen Elizabeth Hospital, Gateshead). He was awarded a PhD in 2002 from the Democritus University of Thrace, Greece (title of PhD thesis: The effect of H. pylori infection on gastric emptying in patients with functional dyspepsia). He worked for a short period as a Consultant Gastroenterologist at the University Hospital of North Durham, UK and then moved to Greece where he worked in private practice while being a Research Associate at the Aristotle University of Thessaloniki. In 2006 he was appointed Consultant Gastroenterologist & Senior Lecturer in Internal Medicine at the Democritus University of Thrace, Alexandroupolis. In 2008 he moved to McMaster University, Hamilton, Canada.

He is Joint Coordinating Editor of the Upper GI and Pancreatic Diseases Cochrane Group and Associate Editor for the Systematic Review Section of the American Journal of Gastroenterology. He currently serves as Lead for Practice Affairs at the Canadian Association of Gastroenterology, responsible for ongoing clinical training, clinical practice-related issues, knowledge dissemination and clinical practice guidelines. His research interests include management of upper GI bleeding and H. pylori infection, translational evolutionary medicine, and methodology of systematic reviews and clinical practice guidelines, especially with regards to the appraisal of the quality of evidence.