title: Hepatitis B virus infection with negative serology in children with acute leukemia.
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D002648:Child; D006509:Hepatitis B / Q000453:epidemiology*; D006515:Hepatitis B virus / Q000187:drug effects*; D006801:Humans; D007938:Leukemia / Q000188:drug therapy*; D014779:Virus Replication / Q000187:drug effects
chemical_list: D000970:Antineoplastic Agents