NEW YORK--(BUSINESS WIRE)--Fitch Ratings has withdrawn the 'A+' rating on the following bond issue on behalf of Baystate Medical Center: --$20.05 million of Massachusetts Health and Educational Facilities Authority Revenue Bonds series K-1 (2009). The rating withdrawal is based on the conversion of the bonds from a long-term interest rate mode to a daily interest rate mode with the support of a letter of credit. Fitch was not asked to rate the bonds upon the conversion to a floating rate mode t