- Efficacy of nerve root versus interspinous injections of glucocorticoids in the treatment of disk-related sciatica. A pilot, prospective, randomized, double-blind study. Kolsi, I., Delecrin, J., Berthelot, J.M., Thomas, L., Prost, A., Maugars, Y. Joint, bone, spine : revue du rhumatisme. (2000)