Alvaro Figueredo , R Bryan Rumble , Jean Maroun , Craig C Earle , Bernard Cummings , Robin McLeod , Lisa Zuraw , Caroline Zwaal and the members of the Gastrointestinal Cancer Disease Site Group of Cancer Care Ontario's Program in Evidence-based Care
BMC Cancer 2003, 3:26doi:10.1186/1471-2407-3-26