On the Mayo Clinic Radio program, Dr. John Kisiel, a gastroenterologist at Mayo Clinic, discusses screening, treatment, and prevention of colorectal cancer. Also on the program, Dr. Matthew Ferber, a medical geneticist at Mayo Clinic, explains Mayo Clinic GeneGuide. GeneGuide is the new personal DNA product backed by Mayo medical science and expertise. And Mayo Clinic experts Dr. Susanne Cutshall, a nurse practitioner and integrative health specialist, and Debbie Fuehrer, a mind-body medicine counselor, offer ideas for dealing with holiday stress and the winter blues.