RT Journal Article SR Electronic T1 Differentiation between various Chondroitin sulfate formulations in symptomatic knee osteoarthritis JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP annrheumdis-2017-212460 DO 10.1136/annrheumdis-2017-212460 A1 Jean Yves Reginster YR 2017 UL http://ard.bmj.com/content/early/2017/11/01/annrheumdis-2017-212460.abstract AB