1. ACGME Program Requirements for Graduate Medical Education in Physical Medicine and Rehabilitation 2010 http://www.acgme.org/acWebsite/downloads/RRC_progReq/340physicalmedicinerehabilitation07012007.pdf
2. Accreditation Council for Graduate Medical Education Program Requirements for Residency Education in Physical Medicine and Rehabilitation, pp. 11-13 http://www.acgme.org/acWebsite/downloads/RRC_progReq/340pr706.pdf
3. American Board of Physical Medicine and Rehabilitation Definition of Physical Medicine https://www.abpmr.org/consumers/pmr_definition.html
4. The use of lumbar epidural/transforaminal steroids for managing spinal disease;Young;J Acad Orthop Surg,2007