RT Journal Article SR Electronic T1 Age at symptom onset in ankylosing spondylitis: is there a gender difference? JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1908 OP 1910 DO 10.1136/annrheumdis-2014-205613 VO 73 IS 10 A1 Adrian Ciurea A1 Almut Scherer A1 Ulrich Weber A1 Regula Neuenschwander A1 Giorgio Tamborrini A1 Pascale Exer A1 Jürg Bernhard A1 Peter M Villiger A1 Rudolf Kissling A1 Beat A Michel A1 Daniel Stekhoven YR 2014 UL http://ard.bmj.com/content/73/10/1908.abstract AB