Dr. Hagen B.E. Klieb is an oral pathologist and staff clinician at Sunnybrook Health Sciences Centre, where he runs the Oral Pathology Clinic in the Department of Dental and Maxillofacial Sciences. He has cross appointment to the Department of Laboratory Medicine and is part of the Head and Neck pathology team. Dr. Klieb is active in post-graduate medical and dental education as well as research with his primary interest being novel treatments for autoimmune disorders. Dr Klieb is also the lead of the Oral Biopsy Unit at LifeLabs, which services dentists across the province of Ontario.