Microarray data merging.

<p>All the effects, including batch effects, profile effects, interaction between batch and profile effects, and residual effects, were estimated for their contribution to the overall variation by PVCA. (<b>A</b>) Data before batch adjustment. (<b>B</b>) Data processed by ComBat as batch adjustment tool/model. (<b>C</b>) Hierarchical clustering of the data before batch adjustment. (<b>D</b>) Hierarchical clustering of the data after batch adjustment.