[1] St Georges Univ London, London, England
[2] Natl & Kapodistrian Univ Athens, Fac Hlth Sci, Sch Med, Natl Dept Anat, Athens, Greece
[3] Queen Alexandra Hosp, Portsmouth, Hants, England
[4] Royal Free Hosp, UCL Inst Liver & Digest Hlth, London, England
[5] UCL, London, England
[6] Natl & Kapodistrian Univ Athens, Hippokrat Gen Hosp, Dept Med & Lab 2, Clin Immunol Rheumatol Unit,Joint Rheumatol Progr, Athens, Greece
[7] Kings Coll London, Sch Biomed Engn & Imaging Sci, London, England
[8] Natl & Kapodistrian Univ Athens, Dept Clin Therapeut, Athens, Greece