EcosystemPhylogenySpecies SpecificityLiving DonorsActivities of Daily LivingAssisted Living FacilitiesLiving WillsIndependent LivingResidence CharacteristicsLuminescent ProteinsCross-Sectional StudiesSocioeconomic FactorsHousingLiver TransplantationRural PopulationMicroscopy, FluorescenceGreen Fluorescent ProteinsRisk FactorsPrevalenceUrban PopulationFluorescent DyesTime FactorsGeriatric AssessmentFluorescence Resonance Energy Transfer