Stegenga Heather, Haines Alexander, Jones Katie, Wilding John
National Collaborating Centre for Mental Health, Royal College of Psychiatrists, London, UK.
National Clinical Guideline Centre, Royal College of Physicians of London, London NW1 4LE, UK
BMJ. 2014 Nov 27;349:g6608. doi: 10.1136/bmj.g6608.