Standard&Poor's Ratings Services affirmed its 'AA/A-1+' rating on Rochester (Mayo Clinic), Minn.'s health variable-rate demand bond series 2000A due to the bank facility being extended to Jan. 17, 2010. The long-term component of the rating is based on Mayo Clinic. The short-term component of the rating is based on Morgan Stanley Bank. Standard&Poor's affirmed its 'AA/A-1+' rating on Rochester (Mayo Clinic), Minn.'s health variable-rate demand bond series 2000B due to the bank facility being extended to Jan. 14, 2009. The long-term component of the rating is based on Mayo Clinic. The short-term component of the rating is based on U.S. Bank N.A. Standard&Poor's affirmed its 'AA/A-1+' rating on Rochester (Mayo Clinic), Minn.'s health variable-rate