1. Department of Rheumatology, Southport and Ormskirk NHS Trust, Southport PR8 6PN, UK
2. Liverpool University Hospitals NHS Foundation Trust, Prescot Street, Liverpool L9 7AL, UK
3. Dartford and Gravesham NHS Trust, Dartford DA2 8DA, UK
4. Department of General Medicine, All India Institute of Medical Sciences (AIIMS), Guwahati 781101, India
5. BMA Library, BMA House, Tavistock Square, British Medical Association, London WC1H 9JP, UK
6. Haematology Division, ICMR-Regional Medical Research Centre, Dibrugarh 786001, India
7. Department of Rheumatology, Royal Lancaster Infirmary, Lancaster LA1 4RP, UK
8. Department of Medicine, Southport and Ormskirk Hospital NHS Trust, Southport PR8 6PN, UK
9. Department of Rheumatology, The Royal Wolverhampton NHS Trust, Wolverhampton WV10 0QP, UK
10. Rheumatologic Outpatient Clinic, Azienda Sanitaria Locale Napoli 3, 80065 Sant’Agnello, Italy