Notophthalmus viridescensExtremitiesRegenerationSalamandridaeAmbystoma mexicanumTurbellariaNotophthalmusAmbystomaForelimbLimb 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 Modified