1. University of Manchester, Manchester Academic Health Science Centre; Division of Nursing, Midwifery and Social Work, School of Health Sciences, Faculty of Biology, Medicine and Health; Jean McFarlane Building Oxford Road Manchester UK M13 9PL
2. Independent Researcher; 7 Victoria Terrace, Kirkstall Leeds UK LS5 3HX
3. St Mary's Hospital; Leeds Community Healthcare NHS Trust; 3 Greenhill Road Leeds UK LS12 3QE
4. University of York; Centre for Health Economics; Alcuin 'A' Block Heslington York UK YO10 5DD