(May 12, 2016, 10:38 AM EDT) -- PITTSBURGH — Dismissal of a securities class action lawsuit is warranted because the lead plaintiff in the action has failed to plead scienter, falsity or loss causation in making its federal securities law claims, defendants argue in a May 5 motion to dismiss (James Martin v. GNC Holdings Inc., et al., No. 15-1522, W.D. Pa.)....