Current applications of ECP. Abbreviations: SLE, systemic lupus erythematosus; RA, rheumatoid arthritis; NSF, nephrogenic systemic fibrosis; MS, multiple sclerosis; DM1, diabetic mellitus type I; CTCL, cutaneous T-cell lymphoma; GVHD, graft-versus-host disease; PV, pemphigus vulgaris; SS, systemic sclerosis; EBA, epidermolysis bullosa acquisita; BOS, bronchiolitis obliterans syndrome; HIV, human immunodeficiency virus. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]