PsoriasisDermatologic AgentsArthritis, PsoriaticPUVA TherapyUltraviolet TherapyCoal TarHLA-C AntigensAcitretinSkinAnthralinKeratolytic AgentsKeratinocytesNail DiseasesClobetasolDermatologyEpidermisPhototherapySeverity of Illness IndexScalp DermatosesDermatitis, AtopicInterleukin-23Skin DiseasesAdministration, Topical