[1] Norfolk & Norwich Univ Hosp, Elsie Bertram Diabet Ctr, Norwich NR4 7UY, Norfolk, England
[2] Loddon Surg, London, Norfolk, England
[3] Norfolk & Norwich Univ Hosp, Dept Ophthalmol, Norwich NR4 7UY, Norfolk, England
[4] Thetford Surg, Thetford, Norfolk, England
[5] Univ E Anglia, Sch Med Hlth Policy & Practice, Norwich NR4 7TJ, Norfolk, England