Address for correspondence
The NIHR Horizon Scanning Centre, Department of Public Health, Epidemiology, and Biostatistics, School of Health&Population Sciences, University of Birmingham, 90 Vincent Drive, Edgbaston, Birmingham, B15 2SP. United Kingdom. Tel: +44 121 414 7831, Fax: +44 121 2269 Email: c.packer@bham.ac.uk