StomatitisMucositisMouth MucosaBenzydamineGlossitisFibroblast Growth Factor 7MouthwashesRadiation InjuriesRadiotherapyOral HemorrhageLaser Therapy, Low-LevelOral UlcerHead and Neck NeoplasmsRadiation Injuries, ExperimentalRadiation-Protective AgentsLasers, SemiconductorTransplantation ConditioningAntineoplastic Combined Chemotherapy ProtocolsFluorouracilChlorhexidineDrug-Related Side Effects and Adverse ReactionsOral HygieneHematopoietic Stem Cell TransplantationMouthMesocricetusCandidiasis, OralAntineoplastic AgentsAnti-Infective Agents, LocalTreatment OutcomeParenteral Nutrition, TotalHematologic NeoplasmsCombined Modality TherapyNeutropeniaNeoplasmsDouble-Blind MethodWhole-Body IrradiationCranial IrradiationLeukemiaEtoposideAdministration, TopicalSeverity of Illness IndexBone Marrow TransplantationCyclophosphamideProspective StudiesLymphomaPrecursor Cell Lymphoblastic Leukemia-LymphomaPainSalivaFibroblast Growth FactorsPilot ProjectsAntimetabolites, AntineoplasticStatistics, NonparametricRecombinant ProteinsCricetinaeXerostomiaMethotrexateLeucovorinDrug Administration Schedule