- Correspondence to Dr A S Arthur, Department of Neurosurgery, University of Tennessee Health Sciences Center, Semmes-Murphey Neurologic and Spine Institute, 6325 Humphreys Blvd, Memphis, TN 38120, USA;
- Received September 10, 2015
- Revised October 23, 2015
- Accepted October 30, 2015
- First published December 14, 2015.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.