[1] East England Ambulance Serv NHS Trust, Res Support Serv, Melbourn, England
[2] Norfolk & Norwich Univ Hosp NHS Fdn Trust, Elsie Bertram Diabet Ctr, Norwich, Norfolk, England
[3] Univ East Anglia, Norwich Med Sch, Norwich, Norfolk, England
[4] Cambridge Univ Hosp NHS Fdn Trust, Inst Metab Sci, Cambridge, England
[5] Cambridge Univ Hosp NHS Fdn Trust, Emergency Dept, Cambridge, England
[6] Univ Hertfordshire, Sch Hlth & Social Work, Hatfield, Herts, England
[7] East Suffolk & North Essex NHS Fdn Trust, Diabet & Endocrine Ctr, Ipswich, Suffolk, England