RT Journal Article SR Electronic T1 Inconsistency between Danish incidence and prevalence data about psoriatic arthritis (PsA) JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP e44 OP e44 DO 10.1136/annrheumdis-2017-212817 VO 78 IS 5 A1 Sewerin, Philipp A1 Hoyer, Annika A1 Schneider, Matthias A1 Ostendorf, Benedikt A1 Brinks, Ralph YR 2019 UL http://ard.bmj.com/content/78/5/e44.abstract AB