1. School of Pharmacy, Faculty of Medical Sciences; Newcastle University; Newcastle upon Tyne UK
2. Theatres and Anaesthetics, Surgery, Cancer and Cardiovascular Division; Imperial College Healthcare NHS Trust; London UK
3. Perioperative Practice and Operating Department Practice, College of Nursing, Midwifery and Healthcare; University of West London; London UK
4. Department of Experimental Psychology; University of Oxford; Oxford UK
5. Cardiothoracic Department, Freeman Hospital; Newcastle upon Tyne Hospitals NHS Foundation Trust; Newcastle upon Tyne UK
6. Pharmacy Department, Freeman Hospital; Newcastle upon Tyne Hospitals NHS Foundation Trust; Newcastle upon Tyne UK
7. Center for Patient Safety Research and Practice, Division of General Internal Medicine; Brigham and Women's Hospital and Harvard Medical School; Boston Massachusetts USA