MINNEAPOLIS - A trial court did not abuse its discretion in finding that a plaintiff in a Baycol failure-to-warn case failed to present competent expert testimony on medical causation and granting summary judgment to the defendant, a panel of the Eighth Circuit U.S. Court of Appeals ruled March 3 (David Flesner v. Bayer AG, et al., No. 08-3524, 8th Cir.). From Mealey's Litigation Report: Heart Drugs & Devices