COB CLEARINGHOUSE CORPORATION, also known as Digital Healthcare, Inc., Plaintiff-Appellant, v. AETNA U.S. HEALTHCARE, INC.; Great West Life and Annuity Insurance Co.; Blue Cross Blue Shield of Kansas City; Connecticut General Life Insurance Company, Defendants-Appellees. No. 02-3645.United States Court of Appeals, Sixth Circuit.Argued: December 12, 2003. Decided and Filed: April 5, 2004. Appeal from the […]