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Kopf SH, Sessions AL, Cowley ES, Reyes C, Van Sambeek L, Hu Y, Orphan VJ, Kato R, Newman DK.Kopf SH, et al.Proc Natl Acad Sci U S A. 2016 Jan 12;113(2):E110-6. doi: 10.1073/pnas.1512057112. Epub 2015 Dec 29.Proc Natl Acad Sci U S A. 2016.PMID: 26715741Free PMC article.