title: Nonresponsiveness of brain tumors to VM-26 therapy in children.
mesh_terms: D000293:Adolescent; D001932:Brain Neoplasms / Q000188:drug therapy*; D002648:Child; D002675:Child, Preschool; D002986:Clinical Trials as Topic; D006801:Humans; D011034:Podophyllotoxin / Q000031:analogs & derivatives*; D013713:Teniposide / Q000627:therapeutic use*; D013997:Time Factors
chemical_list: D013713:Teniposide; D011034:Podophyllotoxin