Mamoon, N.; Iqbal, M. A.; Jamal, S.; Luqman, M. UROTHELIAL NEOPLASIA OF THE URINARY BLADDER - COMPARISON OF INTEROBSERVER VARIABILITY FOR WHO CLASSIFICATION 1972 WITH WHO ISUP CONSENSUS CLASSIFICATION 1998. J Ayub Med Coll Abbottabad 2006, 18, 4-8.