Xanthine OxidaseXanthineXanthine DehydrogenaseXanthinesDeveloping CountriesDeveloped CountriesAllopurinolOxypurinolMolybdenumHypoxanthineHypoxanthinesAldehyde OxidasePteridinesUric AcidEuropeKetone OxidoreductasesMilkSuperoxidesFree RadicalsPurinesTungstenWorld HealthHydroxidesInternational CooperationSuperoxide DismutaseOxidation-ReductionElectron Spin Resonance SpectroscopyTungsten CompoundsInternationalityTheobromineWorld Health OrganizationFlavin-Adenine DinucleotideCoenzymesMetalloproteinsHydroxyl RadicalUrate OxidaseCattleAsiaAfricaHydrogen PeroxideCross-Cultural ComparisonReactive Oxygen SpeciesOxygenDithioniteKineticsCatalasePrevalenceLatin AmericaFree Radical ScavengersNucleobase Transport ProteinsEurope, EasternNADMiddle EastGuanine DeaminaseEuropean UnionEnzyme InhibitorsUnited NationsAfrica South of the SaharaHealth PolicyPentosyltransferasesIndiaLiverPurine-Pyrimidine Metabolism, Inborn ErrorsAldehyde OxidoreductasesPterinsIncidenceTheophyllineTime FactorsCyclic N-OxidesOxidative StressAdenosineReceptors, PurinergicInfant, NewbornAntioxidantsNitric OxideNADPH OxidaseXanthopterinEmigration and ImmigrationInosineSocioeconomic FactorsRisk FactorsScandinaviaPopulation SurveillanceFlavinsVeillonellaAsia, SoutheasternAllantoinSulfurTravelDelivery of Health CareQuestionnairesCross-Sectional StudiesPurinergic P1 Receptor AntagonistsSpectrophotometryOxidantsPublic HealthDisease OutbreaksRhodobacter capsulatusAustralia1-Methyl-3-isobutylxanthine