John D. Birkmeyer, University of Michigan Health System (image) University of Michigan Health System Share Print E-Mail Caption John D. Birkmeyer, M.D., is a professor of surgery and chair of surgical outcomes research at University of Michigan Medical School. Credit Copyright University of Michigan Health System. Used with permission Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.