. 2004 Oct 19;3:35. doi: 10.1186/1475-925X-3-35
Copyright © 2004 Twellmann 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.