Dr. Hagen Klieb is a certified oral medicine and oral pathology specialist and clinician at Sunnybrook Health Sciences Centre, where he holds cross appointments to the departments of dentistry and anatomic pathology.  He also leads the oral pathology biopsy service at LifeLabs.  Dr. Klieb is active in post-graduate dental and medical education and his research interests pertain to mechanisms of orofacial pain and novel therapies for oral autoimmune disorders