NEW YORK--(BUSINESS WIRE)--Fitch Ratings has downgraded the rating on the following revenue bonds issued on behalf of East Texas Medical Center Regional Health System (ETMC) to 'BBB-' from 'BBB': --$35.8 million Wood County Central Hospital District hospital revenue bonds, series 2011; --$255.6 million Tyler Health Facilities Development Corporation hospital revenue bonds, series 2007A. The Rating Outlook remains Negative. SECURITY The bonds are secured by a pledge of gross revenues of the obli