Nazir, Nazia, et al. “Randomized Controlled Trial Comparing the Efficacy and Safety of Epidural Infiltration of Particulate Versus Nonparticulate Steroids in the Treatment of Patients With Sciatic Pain”. International Journal of Innovative Research in Medical Science, vol. 6, no. 12, Dec. 2021, pp. 911-4, doi:10.23958/ijirms/vol06-i12/1306.