. Author manuscript; available in PMC: 2018 Aug 22.
Published in final edited form as: J Manipulative Physiol Ther. 2018 Feb;41(2):137–148. doi: 10.1016/j.jmpt.2017.10.001
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).