Study protocol for a multicentre comparative diagnostic accuracy study of tools to establish the presence and severity of peripheral arterial disease in people with diabetes mellit... oleh Kamlesh Khunti, Athanasios Saratzis, John Norrie, David Mark Epstein, Joseph Shalhoub, Pasha Normahani, Usman Jaffer, M Edmonds, Alun H Davies, Elizabeth Pigott, Laura Burgess, Raju Ahluwalia, Neghal Kandiyil, Sasha Smith, Trusha Coward, Tim Hartshorne, Simon Ashwell