 He has taught courses in the ethics and law of human subjects research, healthcare law, public health, managed care law, occupational health and safety law, the regulation of narcotics, and law and medicine.Barnes and Professor Deborah Greenberg at Columbia Law School founded the first legal clinic addressing the AIDS crisis, to allow law students to represent persons living with AIDS in anti-discrimination cases.The program was funded in part by the U.S. Department of Education and received referrals from the New York City Commission on Human Rights and the State Division of Human Rights.