1  International Committee on Radiation Protection (ICRP). Annals of the ICRP. Publication 53. Pergamon Press, New York, NY. 1987;18: N 1-4, page 242, (Lumbar Injection).

2  The Mayo Clinic Manual of Nuclear Medicine. Michael K. Oconnor, Editor. Mayo Clinic Foundation. Churchill Livingstone, New York, USA, 1996. Page 105. (Lumbar Injection).