. 2012 Feb 15;3:27. doi: 10.4103/2152-7806.92941
Copyright: © 2012 Chow DS.
This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 5.
Trend of medical topics, between 1996 and 2008