Day Chris, Glen Jessica, Floros Lefteris, Pryke Rachel
Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne NE2 4HH, UK.
National Guideline Centre, Royal College of Physicians, London NW1 4LE, UK.
BMJ. 2016 Oct 11;355:i5436. doi: 10.1136/bmj.i5436.