Epstein–Barr virus‐positive mucocutaneous ulcer in a patient with untreated chronic lymphocytic leukemia and hypogammaglobulinemia. Issue 5 (11th March 2020) - Inatsu, Eri; Fujii, Kazuyasu; Hatanaka, Miho; Okubo, Aoi; Uchida, Youhei; Higashi, Yuko; Hiraki, Tsubasa; Tanimoto, Akihide; Kanekura, Takuro