RT Journal Article SR Electronic T1 The risks of smoking in patients with spondyloarthritides JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 791 OP 792 DO 10.1136/annrheumdis-2011-200954 VO 71 IS 6 A1 Jürgen Braun A1 Joachim Sieper A1 Angela Zink YR 2012 UL http://ard.bmj.com/content/71/6/791.abstract AB