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Arthritis Clinical Trials OR odds ratio PAS periodic-acid Schiff PASI Psoriasis Area and Severity Index pDC plasmacytoid dendritic cells PDI Psoriasis Disability Index PGA Physician Global Assessment PR pityriasis rosea PRP pityriasis rubra pilaris PsA psoriatic arthritis PsAQoL Psoriatic Arthritis-specific Quality of Life

instrument PUVA psoralen with ultraviolet A RA rheumatoid arthritis RAPTOR regulatory associated protein of

mammalian target of rapamycin RF rheumatoid factor RR relative risk SCCIS squamous cell carcinoma in situ SF-36 Short Form 36 SNP single nucleotide polymorphism SPI Salford Psoriasis Index STAT1 signal transducer and activator of

transcription 1 TB tuberculosis TCR T cell receptor TLR toll-like receptor TNF-α tumor necrosis factor alpha VCAM-1 vascular adhesion molecule-1 VEGF vascular endothelial growth factor VLDL very low-density lipoprotein

Chapter 1 [1] Bechet PE (1936). Psoriasis, a brief historical

review. Archives of Dermatology and Syphilis 33: 327-334.