Rabar Silvia, Harker Martin, O'Flynn Norma, Wierzbicki Anthony S
National Clinical Guideline Centre, Royal College of Physicians, London NW1 4LE, UK
National Clinical Guideline Centre, Royal College of Physicians, London NW1 4LE, UK.
BMJ. 2014 Jul 17;349:g4356. doi: 10.1136/bmj.g4356.