. 2014 Dec 5;30(1):36–42. doi: 10.1097/YIC.0000000000000046
© 2014 Wolters Kluwer Health | Lippincott Williams & Wilkins
This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 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. http://creativecommons.org/licenses/by-nc-nd/3.0.
Fig. 1.
Study design.