. Author manuscript; available in PMC: 2014 Dec 1.
Published in final edited form as: Pain. 2013 Aug 6;154(12):10.1016/j.pain.2013.07.052. doi: 10.1016/j.pain.2013.07.052
© 2013 International Association for the Study of Pain. Published by Elsevier B.V. All rights reserved.