Jeffery John, Khalil Aoff, Alzein Abdulhalim, Nazir Sarfraz
Department of Surgery, Horton General Hospital, Oxford University Hospitals NHS Trust, Banbury, Oxfordshire OX16 9AL.
Br J Hosp Med (Lond). 2013 Jun;74(6):350-1. doi: 10.12968/hmed.2013.74.6.350.