. 2019 Oct 21;20(2):122–128. doi: 10.1111/papr.12830
© 2019 The Authors. Pain Practice published by Wiley Periodicals, Inc. on behalf of World Institute of Pain
This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Figure 2.
Flow chart of the study.