From the Royal National Orthopaedic Hospital; and London South Bank University, London, United Kingdom.
Reprints: Suzanne Bench, PhD, School of Health and Social Care, London South Bank University, 103 Borough Rd, London, SE1 0AA, United Kingdom. E-mail: [email protected].
The project was supported by a research grant from Becton, Dickinson and Company, who had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript.
The author sits on the European Scientific Advisory board for Becton, Dickinson and Company.