. Author manuscript; available in PMC: 2014 Oct 10.
Published in final edited form as: J Pain Symptom Manage. 2013 Nov 15;47(6):1091–1099.e3. doi: 10.1016/j.jpainsymman.2013.07.016
© 2013 U.S. Cancer Pain Relief Committee. Published by Elsevier Inc. All rights reserved.