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Posted by plosmedicine on 31 Mar 2009 at 00:29 GMT

Author: Nisha Doshi
Position: Publications Assistant
Institution: PLoS Medicine
E-mail: ndoshi@plos.org
Submitted Date: September 02, 2008
Published Date: September 2, 2008
This comment was originally posted as a “Reader Response” on the publication date indicated above. All Reader Responses are now available as comments.

The authors have produced a SciVee video about this paper, which can be viewed at http://www.scivee.tv/node...

No competing interests declared.