[1] Instituto Medicina Molecular,Rheumatology Research Unit
[2] Unidade Saúde Alto Minho,Rheumatology Dept.
[3] Instituto Português Reumatologia,Division of Rheumatology
[4] CEDOC,Rheumatology Dept.
[5] Brigham and Women's Hospital,undefined
[6] SEEBMO,undefined
[7] Centro Hospitalar Universidade Coimbra,undefined