[1] Univ Bristol, Bristol, Avon, England
[2] Univ West England, Acad Rheumatol Unit, Bristol Royal Infirm, Bristol, Avon, England
[3] Peterborough & Stamford NHS Fdn Trust, Peterborough City Hosp, Dept Rheumatol, Edith Cavell Campus, Peterborough, Cambs, England