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Number of identified proteins in the individual colon biopsies, using the direct freezing (DF), RNAlater, immediate formalin-fixed, paraffin-embedded (iFFPE), and 30 min stored formalin-fixed, paraffin-embedded (sFFPE) preparation protocols. Significant changes detected by two-sample t-tests and represented by p-values. NS: not significant, p < 0.05 were considered significant.
