. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: Eur J Pain. 2010 Jul 16;14(10):1007–1013. doi: 10.1016/j.ejpain.2010.04.001
© 2010 European Federation of Chapters of the International Association for the Study of Pain. Published by Elsevier Ltd. All rights reserved.