Cerebral EBV-positive PTLD controlled by PD-1 checkpoint blockade in a liver transplant patient. Issue 8 (3rd July 2021) - Bittner, Aitomi; Radke, Josefine; Eurich, Dennis; Wiener, Edzard; Denker, Sophy; Anagnostopoulos, Ioannis; Na, Il-Kang; Heppner, Frank L.; Bullinger, Lars; Schmitt, Clemens A.