Durable Medical EquipmentCompetitive BiddingArtificial LimbsProstheses and ImplantsAmputeesMedicare AssignmentOrthotic DevicesAmputation StumpsElectrodes, ImplantedProsthesis DesignEmbryo Implantation, DelayedCochlear ImplantationLens Implantation, IntraocularPacemaker, ArtificialUterusStentsPregnancyEndometriumTreatment OutcomeEmbryo TransferAortic Valve StenosisDrug-Eluting StentsDefibrillators, ImplantableLenses, IntraocularTime FactorsCardiac CatheterizationDeciduaBioprosthesisPenile ImplantationCoronary RestenosisFollow-Up StudiesHeart-Assist DevicesDrug ImplantsAortic ValveFertilization in VitroTrophoblastsBlood Vessel Prosthesis ImplantationSirolimusEquipment FailurePregnancy RateProsthesis FailureImplants, ExperimentalRetrospective StudiesAngioplasty, Balloon, CoronaryCoronary AngiographyCardiac Pacing, Artificial