( August 3, 2023, 1:06 PM EDT) -- ST. LOUIS — Even assuming that the record allowed for the conclusion that a man was exposed to asbestos and other toxins at a railway, there is nothing establishing the level of exposure, and a court properly excluded expert testimony based on the belief that there was sufficient evidence of such exposure, an Eighth Circuit U.S. Court of Appeals panel said Aug. 2 in affirming summary judgment to a railway company....