Ziprin Paul, Ridgway Paul F, Peck David H, Darzi Ara W
Department of Surgical Oncology and Technology, Faculty of Medicine, Imperial College of Science Technology and Medicine, St Mary's Hospital, London, United Kingdom.
J Am Coll Surg. 2002 Sep;195(3):395-408. doi: 10.1016/s1072-7515(02)01249-8.