1. Department of Integrated Academic Training, University of Nottingham, Nottingham, UK
2. Department of Cardiothoracic Surgery, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, UK
3. Department of Respiratory Medicine and Interventional Pulmonology, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, UK
4. Department of Histopathology, University Hospitals of North Midlands NHS Trust, Stoke-on-Trent, UK