. 2018 Aug 3;97(31):e11760. doi: 10.1097/MD.0000000000011760
Copyright © 2018 the Author(s). Published by Wolters Kluwer Health, Inc.
This is an open access article distributed under the Creative Commons Attribution-NoDerivatives License 4.0, which allows for redistribution, commercial and non-commercial, as long as it is passed along unchanged and in whole, with credit to the author. http://creativecommons.org/licenses/by-nd/4.0
Figure 1.
Flow diagram of the articles selection process.