Leslie S. Zun, M.D., M.B.A. is a Professor of Emergency Medicine with a secondary appointment in Psychiatry at Rosalind Franklin University of Medicine and Science/Chicago Medical School. He holds an MD from Rush Medical College and an MBA from Northwestern University. Dr. Zun is Chief Medical Officer for Hamdard Health Alliance and has lectured nationally and internationally on emergency and psychiatric care. He is a past president of the American Association for Emergency Psychiatry, editor of Behavioral Emergencies for Healthcare Providers, and longtime course director of the National Update on Behavioral Emergencies conference.