1. RTI Health Solutions; Manchester UK
2. Division of Health Sciences; Warwick Medical School, University of Warwick; Coventry UK
3. Warwick Medical School; University of Warwick; Coventry UK
4. Public Health and Epidemiology; Division of Health Sciences; Coventry UK
5. Department of Epidemiology and Biostatistics; Schulich School of Medicine and Dentistry, Western University; London Canada
6. Norwich Medical School; University of East Anglia; Norwich UK
7. Division of Health Sciences, Warwick Medical School; University of Warwick; Coventry UK