. 2014 Jul 2;39(4):341–346. doi: 10.1097/AAP.0000000000000107
Copyright © 2014 by American Society of Regional Anesthesia and Pain Medicine
This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivitives 3.0 License, where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially.
FIGURE 1.
Study compliance.