NEW YORK--(BUSINESS WIRE)--Fitch Ratings has affirmed the 'BBB' rating on the following Iowa Finance Authority bonds issued on behalf of Pella Regional Health Center (PRHC): --$46.7 million health facilities revenue bonds, series 2006. The Rating Outlook is Stable. SECURITY The bonds are secured by a pledge of gross revenues of the obligated group, and a first-priority mortgage on certain property. KEY RATING DRIVERS BALANCE SHEET GROWTH: At March 31, 2015, PRHC's unrestricted cash and investme