Pearl Therapeutics' Formoterol Fumarate MDI (FF-MDI, PT005) Demonstrates Pharmacokinetic Bioequivalence To Foradil® Aerolizer® In A Randomized, Double-Blind, Single Dose, Six-Treatment, Placebo-Controlled, Crossover Phase 2b Study In Patients With Moderate To Severe Chronic Obstructive Pulmonary Disease