Clinical features of human immunodeficiency virus-associated malignancies in children and adolescents: a series of case reports - Grigory M. Sergienko; M. Yu. Goroshkova; E. P. Shabashkevich; D. V. Glushkov; N. V. Selivanova; M. M. Kotovich (Pediatric Hematology/Oncology and Immunopathology, 2026)