PT - JOURNAL ARTICLE AU - M J Riley AU - B M Ansell AU - E G Bywaters TI - Radiological manifestations of ankylosing spondylitis according to age at onset. AID - 10.1136/ard.30.2.138 DP - 1971 Mar 01 TA - Annals of the Rheumatic Diseases PG - 138--148 VI - 30 IP - 2 4099 - http://ard.bmj.com/content/30/2/138.short 4100 - http://ard.bmj.com/content/30/2/138.full SO - Ann Rheum Dis1971 Mar 01; 30