[1] Univ Barcelona, Dept Internal Med, Hosp Clin, Inst Invest Bimoed August Pi i Sunyer, E-08036 Barcelona, Spain
[2] Univ Barcelona, Dept Immunol, Hosp Clin, Inst Invest Bimoed August Pi i Sunyer, E-08036 Barcelona, Spain
[3] Univ Barcelona, Dept Autoimmune Dis, Hosp Clin, Inst Invest Bimoed August Pi i Sunyer, E-08036 Barcelona, Spain
[4] Cleveland Clin Fdn, Dept Immunol, Lerner Res Inst, Cleveland, OH 44195 USA