Hanna Fahmy W F, Issa Basil G, Sim Julius, Keevil Brian, Fryer Anthony A
Staffordshire University, University Hospital of North Midlands, Stoke-on-Trent, UK
University Hospital of South Manchester, Manchester, UK.
BMJ. 2018 Jan 18;360:j5674. doi: 10.1136/bmj.j5674.