Identifying Trajectories of Radiographic Spinal Disease in Ankylosing Spondylitis: A 15-year follow up study of the PSOAS Cohort.

Hwang MC, Lee M, Gensler LS, Brown MA, Tahanan A, Rahbar MH, Hunter T, Shan M, Ishimori ML, Reveille JD, Weisman MH, Learch TJ, PSOAS Study Investigators