. 2012 Sep 5;12:741. doi: 10.1186/1471-2458-12-741
Copyright ©2012 Ye et al.; licensee BioMed Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 2.
Complementary roles played by HDSS and HMIS.