1. Queen Elizabeth University Hospital (The Southern General Hospital); Institute of Neurological Sciences; 1345 Govan Road Glasgow Scotland UK G51 4TF
2. University of Oxford; Nuffield Department of Surgical Sciences; Headley Way Headington Oxford UK OX3 9DU
3. University Hospital Ayr; Department of Urological Surgery; Dalmellington Road Ayr UK DA6 6KD
4. John Radcliffe Hospital; Department of Vascular & Endovascular Surgery; Headley Way Headington Oxford UK OX3 9DU