. 2008 Feb 20;2:7–15. doi: 10.2174/1874306400802010007
2008 Bentham Science Publishers Ltd.
This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.5/) which permits unrestrictive use, distribution, and reproduction in any medium, provided the original work is properly cited.
Fig. (2).
