Anatomic VariationParanasal SinusesPhlebographyPrevalenceCadaverImaging, Three-DimensionalTomography, X-Ray ComputedImage Processing, Computer-AssistedRetrospective StudiesGenetic VariationRisk FactorsCross-Sectional StudiesAge FactorsSex FactorsAge DistributionGenotypeModels, AnatomicUnited StatesBrazilSex DistributionTime FactorsQuestionnairesReproducibility of ResultsHealth SurveysChinaSeasonsCohort StudiesIncidenceProspective StudiesLogistic ModelsInfant, NewbornIndiaAntigenic VariationRural PopulationGeographySocioeconomic FactorsPolymerase Chain ReactionUrban PopulationPhylogenyMagnetic Resonance ImagingPolymorphism, Single NucleotideSequence Analysis, DNAPhenotypeCase-Control StudiesMolecular Sequence DataPolymorphism, GeneticSmokingPregnancyFollow-Up StudiesObserver VariationDNA Copy Number VariationsTreatment OutcomeAllelesSeverity of Illness IndexSpecies SpecificityEuropean Continental Ancestry GroupHIV InfectionsOdds RatioPopulation SurveillanceRegression AnalysisComorbidityObesityChi-Square DistributionHaplotypesSensitivity and SpecificityRisk AssessmentGene FrequencySpainEthnic GroupsBody Mass IndexJapanChronic DiseaseMultivariate AnalysisBase SequenceEpidemiologic MethodsAnatomic LandmarksMass ScreeningGenetic Predisposition to DiseaseEuropePredictive Value of TestsAnalysis of VarianceRural HealthFecesMutationReference ValuesCluster AnalysisTurkeyDemographyItalyDiabetes MellitusGenetics, PopulationAlgorithmsHypertensionIranUrban HealthFranceAfrican Continental Ancestry GroupAsian Continental Ancestry GroupDissectionGreat Britain