(BUSINESS WIRE)--Pfizer Inc. (NYSE: PFE) today announced that data from a Phase 2 efficacy and safety study of tasocitinib (proposed INN name for CP-690,550), the company's investigational oral JAK inhibitor, met its primary endpoint of a statistically significant greater proportion of patients achieving at least a 75 percent reduction from baseline in PASI (Psoriasis Area and Severity Index) at week 12 in individuals with chronic moderate to
