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. Author manuscript; available in PMC: 2015 Apr 9.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2013 Jul 4;934:16–21. doi: 10.1016/j.jchromb.2013.06.031

Fig. 2.

Fig. 2

Ion suppression. Neat standards were compared to standards spiked in precipitated steroid-free serum (n = 5).