In each individual microarray, probes were identified as E (expressed), M (marginal), or A (absent) in an individual array after linearization and normalization as described in text, and only those classified as E were calculated for ratio values of the signal intensities of experimental samples against controls in the same arrays. For statistical purposes, probes marked as E in only one of three microarrays in one model were classified as A in this table. Down-Reg meant a signal intensity ratio of the experimental sample/control ≤0.5 plus FDR<1%, and Up-Reg meant ≥2.0 plus FDR<1%. Unchanged was for those of 0.5<ratio<2 or FDR>1%.