Mealey's (November 4, 2019, 1:03 PM EST) -- CINCINNATI — A trial court properly excluded an expert witness for the estate of a woman who was allegedly injured during sinus surgery, the Sixth Circuit U.S. Court of Appeals held Oct. 30 in a medical malpractice case that ended in a jury verdict for the operating doctor (Duane M. Mathis v. R. Arturo Roa, M.D., et al., No. 18-4168, 6th Cir., 2019 U.S. App. LEXIS 32460)....