Erratum to: Pain Ther (2013) 2:57–64 DOI 10.1007/s40122-013-0012-0

The Editors of Pain and Therapy would like to make the following addition to the Acknowledgments section of the above-mentioned paper. This required wording was unintentionally missed off the original version of the manuscript.

“Compliance with Ethics Guidelines: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000 and 2008. Informed consent was obtained from all patients for being included in the study.”