SAM outputs. SAM plotsheet outputs under the four sets of criteria: Δ = 0.25, fold change = 2. Conditions are indicated at the upper right corner of each plotsheet. The red, green, and black dots represent upregulated, downregulated, and insignificantly changed miRNAs, respectively. The upper and lower 45° degree lines indicate the Δ threshold boundaries. The number of significant miRNAs, median number of false positives, and false discovery rate (FDR) are indicated at the upper left corner of the plotsheet.