[1] Maulana Azad Med Coll, 2 Bahadurshah Zafar Marg, Delhi 110002, India
[2] Sanjay Gandhi Postgrad Inst Med Sci, Dept Clin Immunol & Rheumatol, Rae Bareilley Rd, Lucknow 226014, Uttar Pradesh, India
[3] Royal Wolverhampton Hosp NHS Trust, Dept Rheumatol, Wolverhampton WV10 0QP, England
[4] Univ Manchester, Manchester Acad Hlth Sci Ctr, Fac Biol Med & Hlth, Ctr Musculoskeletal Res,Sch Biol Sci,Div Musculos, Manchester, Lancs, England
[5] Salford Royal NHS Fdn Trust, Manchester Ctr Clin Neurosci, Salford, Lancs, England
[6] Mahatma Gandhi Mission Med Coll, Navi Mumbai, Maharashtra, India
[7] Istanbul Univ, Istanbul Fac Med, Dept Med Ecol & Hydroclimatol, TR-34093 Istanbul, Turkey
[8] Pomeranian Med Univ, Dept Rheumatol Internal Med Geriatr & Clin Immuno, Ul Unii Lubelskiej 1, PL-71252 Szczecin, Poland
[9] Cairo Univ, Kasr Al Ainy Sch Med, Rheumatol Dept, Cairo, Egypt
[10] Fauji Fdn Hosp, Rheumatol Dept, Rawalpindi, Pakistan
[11] Sofia Univ St Kliment Ohridski, Med Fac, Dept Clin Immunol, Univ Hosp Lozenetz, 1 Kozyak Str, Sofia 1407, Bulgaria
[12] Inst Mexicano Seguro Social, Natl Med Ctr La Raza, Gen Hosp, Dept Internal Med, Av Jacaranda S-N, Mexico City 02990, DF, Mexico
[13] Karolinska Inst, Dept Med Solna, Div Rheumatol, Stockholm, Sweden
[14] Karolinska Univ Hosp, Stockholm, Sweden
[15] Orebro Univ, Fac Med & Hlth, Dept Rheumatol, Orebro, Sweden
[16] Univ Autonoma Barcelona, Vall Dhebron Gen Hosp, Internal Med Dept, Barcelona 08035, Spain
[17] Kings Coll London, Ctr Rheumat Dis, London, England
[18] Kings Coll Hosp London, Rheumatol Dept, London, England
[19] Leeds Teaching Hosp Trust, NIHR Leeds Biomed Res Ctr, Leeds, W Yorkshire, England
[20] Univ Leeds, Leeds Inst Rheumat & Musculoskeletal Med, Leeds, W Yorkshire, England
[21] Univ Pavia, Rheumatol Unit, Dipartimento Med Interna & Terapia Med, Pavia, Lombardy, Italy
[22] IMSS, Ctr Med Nacl La Raza, Dept Reumatol Hosp Especialidades Dr Antonio Frag, Mexico City, DF, Mexico
[23] Univ Sao Paulo, Fac Med FMUSP, Div Rheumatol, Sao Paulo, SP, Brazil
[24] St Joseph Univ, Rheumatol Dept, Beirut, Lebanon
[25] Hotel Dieu France Hosp, Rheumatol Dept, Beirut, Lebanon
[26] Friedrich Alexander Univ Erlangen Nurnberg, Univ Klinikum Erlangen, Med Klin Rheumatol & Immunol 3, Ulmenweg 18, D-91054 Erlangen, Germany
[27] Nippon Med Sch, Dept Allergy & Rheumatol, Grad Sch Med, Bunkyo Ku, 1-1-5 Sendagi, Tokyo 1138602, Japan
[28] Lund Univ, Dept Clin Sci, Rheumatol, Malmo, Sweden
[29] Skane Univ Hosp, Dept Rheumatol, Lund, Sweden
[30] Southport & Ormskirk Hosp NHS Trust, Southport PR8 6PN, England
[31] Univ Zurich, Univ Hosp Zurich, Dept Rheumatol, Zurich, Switzerland
[32] Univ Manchester, Ctr Musculoskeletal Res, Sch Biol Sci, Div Musculoskeletal & Dermatol Sci, Manchester, Lancs, England
[33] Univ Manchester, Manchester Univ NHS Fdn Trust, Natl Inst Hlth Res, Manchester Biomed Res Ctr, Manchester, Lancs, England
[34] Salford Royal NHS Fdn Trust, Manchester Acad Hlth Sci Ctr, Dept Rheumatol, Salford, Lancs, England
[35] Univ Pittsburgh, UPMC Arthrit & Autoimmun Ctr, Sch Med, Div Rheumatol & Clin Immunol,Dept Med, 3601 Fifth Ave,Suite 2B, Pittsburgh, PA 15213 USA