AK has nothing to disclose. NN has nothing to disclose. MA has nothing to disclose. Data from Takeda Pharmaceuticals U.S.A. Inc. was provided by the company upon specific request from the authors for data on maribavir and renal impairment. Takeda Pharmaceuticals U.S.A. Inc. was not involved in any aspects of manuscript conception or preparation. The data that supports the findings of this paper is available from the corresponding author, AK, upon reasonable request.