[1] Harrogate & Dist NHS Fdn Trust, Dept Podiatry, Scarborough, England
[2] Univ Leeds, Leeds Inst Rheumat & Musculoskeletal Med, 2 Floor Chapel Allerton Hosp,Chapeltown Rd, Leeds LS7 4SA, England
[3] York & Scarborough Teaching Hosp NHS Fdn Trust, Dept Diabet & Endocrinol, York, England
[4] Univ Leeds, Leeds Inst Hlth Sci, Leeds, England