Dr Mark W. Green is the Director of Headache and Pain Medicine and Professor of Neurology, Anesthesiology, and Rehabilitation Medicine at the Icahn School of Medicine at Mount Sinai, USA. He graduated from Case Western Reserve University, USA, and received his medical degree from the Albert Einstein College of Medicine, USA, where he also received his training in neurology. He is an Adjunct Professor of Medicine at the New York College of Podiatric Medicine and an Adjunct Professor of Medical Education at the Sophie Davis School of Medicine at the City University of New York. He was one of the founding editors of CEPHALAGIA, the international headache journal, and served as the Associate Editor of HEADACHE, the journal of the American Headache Society. He has been active in the practice of headache and facial pain since 1978, and has lectured throughout the world on this subject, in addition to writing numerous articles on various subjects concerning headache and facial pain.