1. Bhatia A, Flamer D, Shah PS, Cohen SP. Transforaminal epidural steroid injections for treating lumbosacral radicular pain from herniated intervertebral discs: a systematic review and meta-analysis. Anesth Analg. 2016;122:857–70.
2. Bicket MB, Hurley RW, Moon JY, Brummett CM, Hanling S, Huntoon MA, Van Zundert J, Cohen SP. The development and validation of a quality assessment and rating of technique for injections of the spine (AQUARIUS). Reg Anesth Pain Med. 2016;41:80–5.
3. De Palma L, Di Lazzaro A. Clinical and pathogenetic observations on the lumbar herniated disk syndrome in the aged. Arch Putti Chir Organi Mov. 1978;29:139–47.
4. Jordan J, Konstantinou K. O’Dowd herniated lumbar disc. BMJ Clin Evid. 2011;28:2011.
5. Kaye AD, Manchikanti L, Abdi S, Atluri S, Bakshi S, Benyamin R, Boswell MV, Buenaventura R, Candido KD, Cordner HJ, Datta S, Doulatram G, Gharibo CG, Grami V, Gupta S, Jha S, Kaplan ED, Mala Y, Mann DP, Nampiaparampil DE, Racz G, Raj P, Rana MV, Sharma ML, Singh V, Soin A, Staats PS, Vallejo R, Wargo BW, Hirsch JA. Efficacy of epidural injections in managing chronic spinal pain: a best evidence synthesis. Pain Phys. 2015;18:E939–1004.