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Ahmad A, Bhattacharya A, McDonald RA, Cordes M, Ellington B, Bertelsen EB, Zuiderweg ER.Ahmad A, et al. Among authors: ellington b.Proc Natl Acad Sci U S A. 2011 Nov 22;108(47):18966-71. doi: 10.1073/pnas.1111220108. Epub 2011 Nov 7.Proc Natl Acad Sci U S A. 2011.PMID: 22065753Free PMC article.