In Vivo Emergence of UL56 C325Y Cytomegalovirus Resistance to Letermovir in a Patient With Acute Myeloid Leukemia After Hematopoietic Cell Transplantation. Mediterr J Hematol Infect Dis 2019, 11 (1), e2019001. https://doi.org/10.4084/mjhid.2019.001.