Reply re: Murali Varma, Brett Delahunt, Theodorus van der Kwast. Grading Noninvasive Bladder Cancer: World Health Organisation 1973 or 2004 May Be the Wrong Question. Eur Urol. In press. https://doi.org/10.1016/j.eururo.2019.05.001: Two Decades of World Health Organisation/International Society of U