Jones Clare, Pollit Vicki, Fitzmaurice David, Cowan Campbell
Royal College of Physicians, National Clinical Guideline Centre, London NW1 4LE, UK
Royal College of Physicians, National Clinical Guideline Centre, London NW1 4LE, UK.
BMJ. 2014 Jun 19;348:g3655. doi: 10.1136/bmj.g3655.