Mealey's (March 6, 2018, 8:29 AM EST) -- PHILADELPHIA — A medical expert is sufficiently qualified to opine that a Sears Craftsman Weedwacker caused a man’s back injuries, a Pennsylvania federal judge held March 2 while also trimming an ergonomics expert’s testimony to one opinion on how the Weedwacker’s faulty design led to the injuries (Thomas Hagan v. Sears Appliance and Hardware Store, et al., No. 16-6461, E.D. Pa., 2018 U.S. Dist. LEXIS 34190)....