1. University College London; Research Department of Primary Care and Population Health; Upper Floor 3, Royal Free Hospital Rowland Hill Street London UK NW3 PF
2. University of Oxford; Department of Primary Care Health Sciences; Radcliffe Observatory Quarter, Walton Street Oxford UK OX2 6GG
3. The Whittington Hospital NHS Trust; Department of Diabetes; Magdala Avenue London UK N19 5NF
4. Archway Healthcare Library; Holborn Union Building Archway Campus, Highgate Hill London UK N19 5LW