. 2014 Mar 26;2014:603853. doi: 10.1155/2014/603853
Copyright © 2014 Víctor Manuel Mendoza-Núñez et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
General scheme for study tracking.