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Gehrke CW, Waalkes TP, Borek E, Swartz WF, Cole TF, Kuo KC, Abeloff M, Ettinger DS, Rosenshein N, Young RC.Gehrke CW, et al.J Chromatogr. 1979 Apr 11;162(4):507-28.J Chromatogr. 1979.PMID: 528665