1. South Tyneside and Sunderland NHS Foundation Trust Sunderland UK
2. Addictions Services at Cumbria, Northumberland Tyne and Wear NHS FT Newcastle upon Tyne UK
3. South London and Maudsley NHS Foundation Trust London UK
4. Royal Papworth Hospital NHS Trust Cambridge UK
5. Leeds Teaching Hospitals NHS Trust Leeds UK
6. Manchester UK
7. Department of Anaesthesia London North West Hospital Trust London UK
8. Department of Anaesthesia Newcastle upon Tyne NHS Foundation Trust Newcastle UK
9. Glasgow UK
10. NHS Practitioner Health London UK