[1] Sanjay Gandhi Postgrad Inst Med Sci, Dept Clin Immunol & Rheumatol, Lucknow, Uttar Pradesh, India
[2] King Georges Med Univ, Dept Clin Immunol & Rheumatol, Lucknow, Uttar Pradesh, India
[3] Maulana Azad Med Coll, Delhi, India
[4] Dayanand Med Coll & Hosp, Dept Clin Immunol & Rheumatol, Ludhiana, Punjab, India
[5] Royal Wolverhampton Hosp NHS Trust, Dept Rheumatol, Wolverhampton, England
[6] Sandwell & West Birmingham Hosp NHS Trust, City Hosp, Birmingham, England
[7] Univ Manchester, Ctr Musculoskeletal Res, Sch Biol Sci, Div Musculoskeletal & Dermatol Sci, Manchester, England
[8] Royal Wolverhampton Hosp NHS Trust, Dept Rheumatol, Wolverhampton WV10 0QP, England