MucositisStomatitisMouth MucosaHead and Neck NeoplasmsRadiation InjuriesRadiotherapyFluorouracilAntineoplastic Combined Chemotherapy ProtocolsMouthwashesFibroblast Growth Factor 7Antimetabolites, AntineoplasticXerostomiaCombined Modality TherapyMethotrexateGlossitisLeucovorinDrug Administration ScheduleLaser Therapy, Low-LevelOral UlcerBenzydamineTreatment OutcomeAgeusiaAntineoplastic AgentsNeutropeniaLichenoid EruptionsAmifostineCisplatinInfusions, IntravenousHematologic NeoplasmsThiotepaOral HemorrhageEriobotryaRadiation-Protective AgentsNeoplasmsRadiodermatitisHematopoietic Stem Cell TransplantationSucraseDrug EvaluationAminopterinEtoposideTolonium ChlorideHematologic DiseasesHematoxylinCyclophosphamideTransplantation, AutologousLasers, SemiconductorCryotherapyDose-Response Relationship, DrugMelphalanTransplantation ConditioningIntestine, SmallAnti-Infective Agents, LocalIntestinal MucosaRadiation Injuries, ExperimentalCarcinoma, Squamous CellDoxorubicinTaxoidsSerotonin 5-HT3 Receptor AgonistsPropanthelineDrug-Related Side Effects and Adverse ReactionsMucous MembraneDisease-Free Survival