. 2011 Mar 31;2011:750249. doi: 10.1155/2011/750249
Copyright © 2011 Elizete Maria Rita Pereira 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.
Flow diagram about desgining of study.