[1] Hosp Clin Barcelona, Lab Enfermedades Autoinmunes Josep Font, Serv Enfermedades Autoinmunes, IDIBAPS, Barcelona, Spain
[2] Univ Basque Country, Hosp Univ Cruces, Serv Med Interna, Unidad Invest Enfermedades Autoinmunes, Baracaldo, Bizkaia, Spain
[3] Hosp Virgen de las Nieves, Med Interna Serv, Granada, Spain
[4] St Thomas Hosp, Rayne Inst, Kings Coll London Sch Med, Lupus Res Unit,Guys Hosp, London SE1 7EH, England
[5] St Thomas Hosp, Rayne Inst, Kings Coll London Sch Med, Lupus Res Unit,Kings Hosp, London SE1 7EH, England
[6] St Thomas Hosp, Rayne Inst, Kings Coll London Sch Med, Lupus Res Unit, London SE1 7EH, England