A $6 million gift from the estate of Joseph Stern Jr., who had been president and chairman of U.S. Shoe Corp., and his wife, Mary, will create three endowed chairs at the University of Cincinnati College of Medicine. “Their generosity means so much to us and will make a tremendous impact on our faculty, whose work is critical to the future of our university’s mission to provide medical education, innovative research and health care,” UC President Neville Pinto said. Mary Stern died in June…