Spinal PunctureAnesthesia, SpinalBone MarrowPuncturesBone Marrow CellsBone Marrow TransplantationBone and BonesSpinal CordSpinal Cord InjuriesBone RemodelingBone Marrow DiseasesBone Marrow ExaminationBone Marrow NeoplasmsPost-Dural Puncture HeadacheHematopoietic Stem CellsBone DensityBone ResorptionBone Marrow PurgingBone NeoplasmsHematopoiesisMice, Inbred C57BLInjections, SpinalTransplantation, HomologousBone DevelopmentCell DifferentiationBone DiseasesColony-Forming Units AssayCells, CulturedBone RegenerationSpinal NervesTransplantation, AutologousWhole-Body IrradiationSpinal Cord DiseasesRadiation ChimeraStromal CellsTime FactorsGraft vs Host DiseaseAnemia, AplasticSpinal Nerve RootsNeedlesFlow CytometryOsteogenesisSpinal Cord NeoplasmsSpinal DiseasesSpinal CanalSpinal NeoplasmsBone TransplantationLeukemiaBone MatrixSpinal Cord Compression