After nearly three years of work, the University of Minnesota on Wednesday released new rules governing potential conflicts of interest between personnel in its medical school and business interests, including drug and medical device companies. The ethics policy overhaul is part of a university-wide effort, but officials at the U say the new rules are far tougher for faculty and staff at the Academic Health Center, which includes the schools of Medicine, Dentistry, Nursing and colleges of Pharmacy and Veterinary Medicine. The policy for the health center took effect on Wednesday. "The feeling was that the bar needed to be higher for people who come in clinical contact with patients and others," said Frank Cerra, MD, the U's senior vice president for health sciences. "I think it's a good policy."