Keshtgar Mohammed, Hamidian Jahromi Alireza, Davidson Tim, Escobar Paula, Mallucci Patrick, Mosahebi Afshin, Baum Michael
University Department of Surgery, Royal Free Hampstead NHS Trust and Royal Free and University College Medical School, London NW3 2QG.
BMJ. 2009 Mar 10;338:b630. doi: 10.1136/bmj.b630.