Mealey's (May 15, 2019, 1:49 PM EDT) -- HARRISBURG, Pa. — A collection of industry groups filed a joint amicus curiae brief in the Pennsylvania Supreme Court on May 14, contending that a lower court erred when it approved the plaintiffs’ aggregate causation theory in a wrongful death lawsuit because the Frye evidence standard was not met (Richard Thomas Walsh v. BASF Corporation, et al., No. 14 WAP 2019, Pa. Sup.)....