BRIEF-Citron's Left says "there is no way Valeant can go lower without dragging Mallinckrodt"- CNBC By: Reuters: Company News May 17, 2016 at 12:28 PM EDT * Citron Research's Andrew Left says he is long Valeant and short Mallinckrodt - CNBC Read More >> Related Stocks: Mallinckrodt plc Valeant Pharmaceuticals International, Inc.