ROCHESTER, Minn. – The Mayo Clinic of Rochester has been named the top hospital in the country for the fifth year in a row in six specialties. The ranking, from the magazine U.S. News & World Report, cited Mayo for diabetes and endocrinology, gastroenterology and gastroenterology surgery, gynecology, nephrology, pulmonology and lung surgery, and urology. Mayo was ranked second for cardiology and heart surgery, second for orthopedics, and third for cancer.