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Dr. Hoffmann is a European-based practicing dermatologist and clinical researcher who has spent decades researching the fields of pattern hair loss, alopecia areata, endocrinology of the hair follicle and hair follicle morphogenesis. Together with Dr. McElwee, he is the applicant of a landmark patent on the use of hair follicle cup cells and their use in hair diseases. He is the co-discoverer of the Company's technology and co-founder of RepliCel. He works in his private dermatology clinical practice, as a teaching professor in the Department of Dermatology for Marburg University, and as a researcher on the histopathology of hair diseases on which he has published many articles and text book chapters.

Dr. Hoffmann has participated in dozens of clinical hair studies and consulted for a variety of large companies on hair matters. He is the inventor of TrichoScan®, a computerized technique to measure hair growth, which is part of a privately owned company which markets the device and related services for dermatologists and clinical trial researchers.