Mariappan, P., Fineron, P., O’Donnell, M., Gailer, R. M., Watson, D. J., Smith, G., & Grigor, K. M. (2020). Combining two grading systems: The clinical validity and inter-observer variability of the 1973 and 2004 WHO bladder cancer classification systems assessed in a UK cohort with 15 years of prospective follow-up. World J Urol.

Mariappan, Paramananthan, Paul Fineron, Marie O’Donnell, Ruth M. Gailer, David J. Watson, Gordon Smith, and Kenneth M. Grigor. "Combining Two Grading Systems: The Clinical Validity and Inter-observer Variability of the 1973 and 2004 WHO Bladder Cancer Classification Systems Assessed in a UK Cohort With 15 years of Prospective Follow-up." World J Urol 2020.

Mariappan, Paramananthan, et al. "Combining Two Grading Systems: The Clinical Validity and Inter-observer Variability of the 1973 and 2004 WHO Bladder Cancer Classification Systems Assessed in a UK Cohort With 15 years of Prospective Follow-up." World J Urol 2020.