1. Translational and Clinical Research Institute, School of Medical Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom;
2. Respiratory Care, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia;
3. Upper Gastrointestinal and General Surgery, South Tees Hospitals NHS Foundation Trust, Middlesbrough, United Kingdom;
4. School of Health Sciences, University of Liverpool, Liverpool, United Kingdom;
5. Royal College of Surgeons of Edinburgh, Edinburgh, Scotland;
6. School of Health and Life Sciences, Teesside University, Middlesbrough, United Kingdom; and
7. Royal Victoria Infirmary, The Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, United Kingdom