. 2016 Mar 5;129(5):562–569. doi: 10.4103/0366-6999.176987
Copyright: © 2016 Chinese Medical Journal
This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
Figure 1.
Flow diagram for study selection.