DactinomycinGestational Trophoblastic DiseaseWilms TumorLeukocyte DisordersVincristineRhabdomyosarcomaTrophoblastic NeoplasmsPulse Therapy, DrugIfosfamideEtoposideSarcoma, EwingAntineoplastic Combined Chemotherapy ProtocolsCyclophosphamideKidney NeoplasmsNeoplasms, Germ Cell and EmbryonalCombined Modality TherapyDoxorubicinBleomycinMethotrexateBone NeoplasmsDrug Administration ScheduleNeoplasm Recurrence, LocalDisease-Free SurvivalNeoplasm StagingTreatment OutcomeSurvival Rate