Tubular atrophy in F344 to LEW renal allografts at day 7, 14, 30, 60, and 100 post-Tx according to Banff criteria (0, no tubular atrophy; 1, tubular atrophy in <25% of cortical tubules; 2, tubular atrophy in 26 to 50% of cortical tubules; 3, tubular atrophy in >51% of cortical tubules). LEW to F344 allografts are shown in day 60 post-Tx.