1. Section of Dermatology and Venereology; Department of Medicine; University of Verona; Piazzale A Stefani 1 37126 Verona Italy
2. Department of Dermatology; Wake Forest University School of Medicine; Winston-Salem NC 27101 U.S.A.
3. Leeds Institute of Rheumatic and Musculoskeletal Medicine; University of Leeds; Leeds U.K.
4. Samsung Bioepis Co., Ltd; Incheon Republic of Korea