The worldwide diabetes epidemic is taking a huge toll in Minnesota. One-third of all adults in the state either have diabetes or are pre-diabetic, with blood glucose levels that are higher than normal. This week, MPR News has been running a series about the effects of diabetes on our state and the potential for a cure. As part of our coverage, Midmorning invited researchers from the University of Minnesota and the Mayo Clinic to join Marianne Combs to discuss the scope of the disease, it's impact, and the most promising avenues of research…Dr. Robert Rizza, endocrinologist, diabetes researcher, and executive dean for research at the Mayo.