RT Journal Article SR Electronic T1 What is the optimal target for a T2T approach in axial spondyloarthritis? JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP annrheumdis-2021-220603 DO 10.1136/annrheumdis-2021-220603 A1 Joachim Sieper A1 Denis Poddubnyy YR 2021 UL http://ard.bmj.com/content/early/2021/06/17/annrheumdis-2021-220603.abstract AB