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SEROLOGICAL CHANGES AGAINST HEPATITIS B SURFACE ANTIGEN IN CHILDREN AND ADOLESCENTS RECEIVING CHEMOTHERAPY FOR ACUTE LEUKEMIA. Mediterr J Hematol Infect Dis [Internet]. 2019 Aug. 29 [cited 2026 May 5];11(1):e2019052. Available from: https://www.mjhid.org/mjhid/article/view/2019.052