The perivascular microenvironment in Epstein-Barr virus positive primary central nervous system lymphoma: The role of programmed cell death 1 and programmed cell death ligand 1 Sugita, Y.; Furuta, T.; Ohshima, K.; Komaki, S.; Miyoshi, J.; Morioka, M.; Abe, H.; Nozawa, T.; Fujii, Y.; Takahashi, H.; Kakita, A. Neuropathology Official Journal of the Japanese Society of Neuropathology 38(2): 125-134 2018 0919-6544 10.1111/neup.12435 https://eurekamag.com/research/060/372/060372611.php