Bone marrow hemophagocytosis in patients with hematological malignancies and COVID-19 infections: mimicry or secondary HLH? - Nooh HA; Abdel-Hamid RM; Abdellateif MS; Refaat L; Bayoumi A; Kandeel EZ; Samra M; Khafagy M; ElAshry MS (Journal of hematopathology, 2026)