1. School of Health Sciences, Division of Nursing, Midwifery and Social Work; University of Manchester; Manchester UK
2. School of Health Sciences; The University of Manchester, and Manchester Academic Health Science Centre; Manchester UK
3. Division of Population Health, Health Services Research & Primary Care, School of Health Sciences; University of Manchester; Manchester UK
4. Department of Clinical Gerontology; Robert-Bosch-Hospital; Stuttgart Germany
5. School of Medicine; Griffith University; Meadowbrook Australia
6. Public Health; West Sussex County Council; Chichester UK
7. Accident Research Centre; Monash University; Victoria Australia
8. School of Health Sciences; University of Manchester; Manchester UK