Ambystoma mexicanumRegenerationExtremitiesTurbellariaNotophthalmusAmbystomaNotophthalmus viridescensForelimbSalamandridaeLimb BudsAnimal FinsPlanariansTriturusAmputationTailUrodelaLimb SalvagePleurodelesLimb Deformities, CongenitalWilms TumorNerve TissueIn Situ HybridizationZebrafishAmputation StumpsPhantom LimbHindlimbGene Expression Regulation, DevelopmentalAnaplasiaMesodermMorphogenesisWound HealingAnimal StructuresBody PatterningGenes, HomeoboxCell DedifferentiationPentosan Sulfuric PolyesterFibroblast Growth FactorsCartilageCell DifferentiationHomeodomain ProteinsZebrafish ProteinsTretinoinMSX1 Transcription FactorEpidermisLegDermisAnimals, Genetically ModifiedLower ExtremityHedgehog ProteinsIschemiaDenervationMolecular Sequence DataXenopus ProteinsCellular MicroenvironmentChoristomaPAX7 Transcription FactorXenopus laevisT-Box Domain ProteinsEmbryo, NonmammalianAmino Acid SequenceMultipotent Stem CellsLarvaTenascinCell ProliferationMusclesArmKidney NeoplasmsBone and BonesTime FactorsImmunohistochemistryModels, BiologicalDNA, ComplementaryGene ExpressionLoop of HenleHeadWnt ProteinsSignal TransductionUreterUpper ExtremityStem CellsBase SequenceCell TransplantationBromodeoxyuridine