Mealey's (June 22, 2016, 2:11 PM EDT) -- PITTSBURGH — Dismissal of a securities class action lawsuit is not proper because the lead plaintiff in the action has properly pleaded a material misrepresentation or omission, scienter and loss causation, the lead plaintiff argues in a June 20 opposition brief filed in Pennsylvania federal court (James Martin v. GNC Holdings Inc., et al., No. 15-1522, W.D. Pa.)....