RT Journal Article SR Electronic T1 Two young girls with pyogenic sacroiliitis JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1353 OP 1354 DO 10.1136/ard.2003.010959 VO 63 IS 10 A1 S W Kadir A1 M E C Jeurissen A1 M J A M Franssen YR 2004 UL http://ard.bmj.com/content/63/10/1353.abstract AB