Literature Drift. Literature Lab results for repeat analysis performed on data from HL60 cells, MPAKT mice, and Breast Cancer tumors. The ranking of the top 10 terms from the Metabolism, Physiology, and Pathway lists are presented when the same analysis was performed within fixed dates (12/31/93 and 12/31/03). The ranking of each term is followed across the 5 monthly repeats by connecting lines. Color of line indicates strength of association (red = "strong"; tan = "moderate", white = no call).