Diagnostic ErrorsDisease SusceptibilityGenetic Predisposition to DiseasePolymorphism, Single NucleotideGenotypeAllelesHaplotypesPolymorphism, GeneticGenome-Wide Association StudyGene FrequencyLinkage DisequilibriumGenetic VariationCase-Control StudiesTomography, X-Ray ComputedMicrobial Sensitivity TestsGenetic LinkageChromosome MappingGenetic MarkersGranuloma, Plasma CellAnti-Bacterial AgentsGenome, HumanHLA-DQ AntigensPhenotypeUnnecessary ProceduresPulmonary Sclerosing HemangiomaNod2 Signaling Adaptor ProteinEpistasis, GeneticCrohn DiseaseHLA-DRB1 ChainsGenetic Association StudiesMutationHLA-DR3 AntigenMagnetic Resonance ImagingHLA-DQ beta-ChainsComplement C4aPlant DiseasesImmunity, InnateFatal OutcomeHLA-DR AntigensRetrospective StudiesGenetic LociLaryngeal DiseasesPedigreeModels, GeneticHobbiesBahrainGenetic Diseases, InbornSalicylic AcidPyoderma GangrenosumChromosomes, Human, Pair 6Genes, MHC Class IIPolymerase Chain Reaction