John A. Marx was Chair Emeritus of the Department of Emergency Medicine at Carolinas Medical Center, Charlotte, North Carolina. In addition, he was Adjunct Professor of Emergency Medicine at the University of North Carolina, Chapel Hill. Dr. Marx's research emphasis was on trauma, especially abdominal trauma, and alcohol-related emergencies. He was a former president of the Society for Academic Emergency Medicine. Dr. Marx was Editor-in-Chief of Rosen's Emergency Medicine: Concepts and Clinical Practice (5th and 6th editions) and was a member of the founding editorial boards of Academic Emergency Medicine, Journal of Emergency Medicine, and Emergindex (Microindex). He wrote for NEJM Journal Watch Emergency Medicine starting with the publication's launch in 1997 and was the Deputy Editor from 2002 until his death in 2012.