(Minneapolis, MN)  --  The Mayo Clinic is once again at the top of the list of the nation’s best hospitals in a national publication. U-S News & World Report issued their 2018 rankings today (Tuesday), and the Rochester medical facility was ranked above all else. The publican says the rankings were determined by hospital service in 16 areas of “complex specialty care,” along with nine bellwether procedures. Mayo’s closest competition came from the Cleveland Clinic, which ranked second, and third-place Johns Hopkins Memorial in Baltimore.