Psarros Thomas G, Zouros Alexander, Coimbra Caetano
Department of Neurosurgery, University of Texas Southwestern School of Medicine, and the Children's Medical Center, Dallas, TX 75390-8855, USA.
South Med J. 2003 Oct;96(10):1019-22. doi: 10.1097/01.SMJ.0000076706.09204.40.