1. Patient reported outcome measures could help transform healthcare;Black;BMJ,2013
2. Health & Social Care Information Centre. Hospital Episode Statistics 2013-14. Available at http://www.hscic.gov.uk/hes. Accessed October 7, 2015.
3. Epidemiology in medicine;Hennekens,1987
4. Measuring disability and quality of life postinjury;McKenzie,2001
5. Optimal recall periods for patient-reported outcomes: challenges and potential solutions;Stull;Curr Med Res Opin,2009