Standard&Poor's Ratings Services said today it assigned its 'AA-' rating to Maryland Health and Higher Educational Facilities Authority's $100 million revenue bonds series 2003, issued for Johns Hopkins Hospital. Standard&Poor's also affirmed its 'AA-' rating on the authority's outstanding hospital revenue bonds, its 'A+' rating on the authority's outstanding lease revenue bonds series A, and its 'A-1+' short-term rating on the authority's $60 million series C pooled loan commercial paper, all issued for the hospital. The 'AA-' rating on the hospital's senior secured obligations reflects the hospital's very strong patient admissions trend and market position, excellent medical staff, and reputation as one of the world's leading academic medical centers. The 898-staffed-bed Johns Hopkins Hospital is frequently