RT Journal Article SR Electronic T1 Association between ankylosing spondylitis and venous thromboembolism JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP annrheumdis-2019-215854 DO 10.1136/annrheumdis-2019-215854 A1 Shih-Wei Lai YR 2019 UL http://ard.bmj.com/content/early/2019/06/18/annrheumdis-2019-215854.abstract AB