letter . 2013 Mar 19;6:7. doi: 10.1186/1865-1380-6-7
Copyright ©2013 Steyn et al.; licensee Springer.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
Effect of vagal nerve stimulation on FEV1 (n = 4).