Mealey's (July 6, 2015, 2:12 PM EDT) -- PHILADELPHIA — An expert may opine regarding, among other things, how Patient Protection and Affordable Care Act (ACA) medical loss ratio (MLR) regulations affect class ascertainability, a federal judge held June 30 in decertifying a class of indirect purchasers of Wellbutrin XL (In re: Wellbutrin XL Antitrust Litigation, No. 08-2433, E.D. Pa.; 2015 U.S. Dist. LEXIS 84444)....