C. Michael RIDDELL, M.D., Appellant, v. UNUM LIFE INSURANCE COMPANY of AMERICA; Tenet Healthcare Corporation, Appellees. No. 06-1210.United States Court of Appeals, Eighth Circuit.Submitted: June 15, 2006. Filed: August 10, 2006. Appeal from the United States District Court for the Eastern District of Arkansas, Garnett Thomas Eisele, J. Page 862 Debra L. Williams, argued, Little […]