Phase I study of cetuximab, irinotecan, and vandetanib (ZD6474) as therapy for patients with previously treated metastastic colorectal cancer. oleh Jeffrey A Meyerhardt, Marek Ancukiewicz, Thomas A Abrams, Deborah Schrag, Peter C Enzinger, Jennifer A Chan, Matthew H Kulke, Brian M Wolpin, Michael Goldstein, Lawrence Blaszkowsky, Andrew X Zhu, Meaghan Elliott, Eileen Regan, Rakesh K Jain, Dan G Duda