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Chang-Chien GP, Lee WS, Tsai JL, Jen SH.Chang-Chien GP, et al.J Chromatogr A. 2001 Oct 12;932(1-2):97-105. doi: 10.1016/s0021-9673(01)01213-4.J Chromatogr A. 2001.PMID: 11695873