Risk factors for progression of nucleus pulposus degeneration in the lumbar intervertebral disc: A retrospective analysis using the disc signal intensity index
Koki Tsuchiya,Ichiro Okano,Ali E. Guven,Paul Köhli,Jan Hambrecht,Gisberto Evangelisti,Erika Chiapparelli,Marco D. Burkhard,Jennifer Shue,Federico P. Girardi,Frank P. Cammisa,Andrew A. Sama,Alexander P. Hughes