. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: Nat Methods. 2010 Oct 31;7(12):973–975. doi: 10.1038/nmeth.1524
Users may view, print, copy, download and 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