RT Journal Article SR Electronic A1 Vinall, Maria T1 APR Improves PsA Symptoms Out to Week 104 JF MD Conference Express YR 2014 FD SAGE Publications VO 14 IS 51 SP 12 OP 13 DO 10.1177/155989771451009 UL http://mdc.sagepub.com/content/14/51/12.abstract AB Psoriatic arthritis occurs in about 30% of patients with psoriasis and is prevalent in an estimated 0.3% to 1.0% of the general population. This article reports on results from the Efficacy and Safety Study of Apremilast to Treat Active Psoriatic Arthritis [PALACE4; NCT01307423].