Vivian Nutton is Emeritus Professor of the History of Medicine at University College London. One of the world's leading experts on Galen, he has published editions of and commentaries on Galen's On Prognosis (1979) and the editio princeps of On my Own Opinions (1999), and is preparing an annotated English translation of the recently discovered Avoiding Distress. He has also edited two collections of essays on Galen, while his Ancient Medicine (2004) is a major synthesis of the history of medicine in classical antiquity from the Greeks to the sixth century CE.