Fig. 4From: Simulating ComBat: how batch correction can lead to the systematic introduction of false positive results in DNA methylation microarray studiesHeatmap of FDR-significant CpG sites after ComBat application. The dotted line indicates the number of corrected factors when “correcting” for a technical batch. Grey tiles were not assessed due to the sample–factor ratio. The redder the cells are, the more false significant CpG sites were found after applying ComBatBack to article page