. Author manuscript; available in PMC: 2011 Jul 1.
Published in final edited form as: Mucosal Immunol. 2010 Aug 25;4(1):112–120. doi: 10.1038/mi.2010.44
Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms