Reply to Pontus Eriksson, Gottfrid Sjödahl, and Fredrik Liedberg's Letter to the Editor re: Thomas Powles, Robert A. Huddart, Tony Elliott, et al. Phase III, Double-blind, Randomized Trial that Compared Maintenance Lapatinib versus Placebo after First-line Chemotherapy in Patients with Human Epidermal Growth Factor Receptor 1/2-positive Metastatic Bladder Cancer. J Clin Oncol 2017;35:48–55. Knowing HER2 Status is Not Enough: A Molecular Subtype Approach to Bladder Cancer is Also Needed