NEW YORK (Standard&Poor's CreditWire) March 12, 1999--Standard&Poor's today assigned its double-'A'-minus rating on Cuyahoga County, Ohio's $29.02 million hospital revenue refunding bonds series 1999A and $138 million hospital revenue bonds series 1999B, issued for the Cleveland Clinic Foundation, Ohio. Standard&Poor's also assigned its double-'A'-minus/'A-1'-plus rating on Collier County Health Facilities Authority, Fla.'s $117 million hospital variable rate revenue bonds series 1999 issued for the Foundation. The bonds are scheduled to sell March 17, 1999. Standard&Poor's also raised its rating on Garfield Heights, Ohio's $22.66 million hospital revenue bonds (Marymount Hospital) and $56.26 million hospital revenue bonds (Fairview Health System) series 1993 and 1994A, issued for the Foundation to double-'A'-minus from single-'A'. In