Troyen A BrennanTroyen A. Brennan is an adjunct professor of health policy and management at the Harvard T.H. Chan School of Public Health. He is a former professor of medicine at Harvard Medical School and the former chief medical officer at CVS Health. He i the author of Just Doctoring: Medical Ethics in the Liberal State and the coauthor of New Rules: Regulation, Markets, and the Quality of American Health Care. Read More Read Less