...Standard & Poor's Ratings Services assigned its 'A-' rating to Maryland Health & Higher Educational Facilities Authority's (MHHEFA) $90 million series 2015 health care revenue bonds, issued for University of Maryland Medical System (UMMS). In addition, Standard & Poor's affirmed its 'A-' rating on various series of MHHEFA health care revenue bonds, also issued for UMMS. The outlook on these ratings is stable. Finally, Standard & Poor's affirmed its '###/A-1+' and '###/A-1' dual ratings on MHHEFA's series 2008D and 2008E variable-rate revenue bonds, respectively, reflecting the application of our low-correlation joint criteria. The long-term components of the ratings are based jointly on bank-supported letters of credit (LOCs) and the 'A-' underlying rating on UMMS. The short-term components of the ratings are based solely on the ratings on the LOC providers, which are:...