PsoriasisDermatologic AgentsArthritis, PsoriaticPUVA TherapyUltraviolet TherapyCoal TarHLA-C AntigensAcitretinSkinSeverity of Illness IndexAnthralinKeratolytic AgentsKeratinocytesNail DiseasesClobetasolPhototherapyDepressionDermatologyEpidermisSymptom AssessmentQuestionnairesTreatment OutcomeDermatitis, AtopicSkin DiseasesQuality of LifeScalp DermatosesInterleukin-23Administration, TopicalCase-Control StudiesDermatitisRisk Factors