Khalid A El-Gendy1*
, Gary K Atkin1*
, Robert E Brightwell2*
, Paul Richman3
and Jeremy I Livingstone1 
1
Department of Surgery, Watford General Hospital, Vicarage Rd, Watford, WD18 0HB, Hertfordshire, UK
2
Department of Biosurgery and Surgical Technology, Imperial College London, London, UK
3
Department of Histopathology, Mount Vernon Hospital, Rickmansworth Rd, Northwood, Middlesex, HA6 2RN, UK