A distinguished member of the Duke University Medical School faculty for almost 40 years, Dr. Pinnell was a professor of dermatology, held the title of J. Lamar Callaway Professor Emeritus of Dermatology, and also served as Chief of Dermatology at Duke University Medical Centre for 15 years. At Duke, he trained physicians from the United States and abroad both as dermatologists and research scientists. With almost four decades of experience in skin cancer, skin disease, and skin ageing research, Dr. Pinnell published more than 200 scientific articles about topical vitamin C, antioxidants, collagen synthesis, and photo-damage in peer-reviewed dermatology journals.