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Butterfield DA, Purdy MJ, Markesbery WR.Butterfield DA, et al. Among authors: purdy mj.Biochim Biophys Acta. 1979 Mar 8;551(2):452-8. doi: 10.1016/0005-2736(89)90020-5.Biochim Biophys Acta. 1979.PMID: 217434