RT Journal Article SR Electronic T1 Colonic large-cell neuroendocrine tumours JF Canadian Journal of Surgery JO CAN J SURG FD Canadian Medical Association SP E49 OP E51 VO 52 IS 3 A1 Gianpiero Gravante A1 Dorotha Markiewicz A1 Francesco Madeddu A1 Pasquale Giordano YR 2009 UL http://canjsurg.ca/content/52/3/E49.abstract