. Author manuscript; available in PMC: 2016 May 4.
Published in final edited form as: J Pain Manag Med. 2016 Mar 30;2(2):114.
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Figure 2.
Flowchart of study participants.