Affiliation: | .Rheumatology Research Group, Vall d’Hebron Research Institute, Barcelona, 08035 Spain ;.Dermatology Service, Hospital Universitari Germans Trias i Pujol, Badalona, 08916 Spain ;.Dermatology Service, Hospital de la Santa Creu i Sant Pau, Barcelona, 08040 Spain ;.Dermatology Service, Hospital Abente y Lago, La Coruña, 15001 Spain ;.Dermatology Service, Hospital Universitario de Salamanca, Salamanca, 37007 Spain |