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Gregson S, Nyamukapa C, Lopman B, Mushati P, Garnett GP, Chandiwana SK, Anderson RM.Gregson S, et al. Among authors: lopman b.Proc Natl Acad Sci U S A. 2007 Sep 11;104(37):14586-91. doi: 10.1073/pnas.0611540104. Epub 2007 Aug 30.Proc Natl Acad Sci U S A. 2007.PMID: 17761795Free PMC article.