BCL2 and neoplasm: The variables available for inclusion in the model were, age (< 65 vs. ≥ 65 years), race (non-Hispanic Caucasians vs. African-Americans), tumor stage (I & II vs. III & IV or node negative vs. node positive), tumor differentiation (low grade vs. high grade), location of tumor (proximal colon, distal colon and rectum), and p53nac and Bcl-2 expression.