Immune responses in advanced colorectal cancer following repeated intradermal vaccination with the anti-CEA murine monoclonal antibody, PR1A3: results of a phase I study. by Zbar, A, Thomas, H, Wilkinson, R, Wadhwa, M, Syrigos, K, Ross, E, Dilger, P, Allen-Mersh, T, Kmiot, W, Epenetos, A, Snary, D, Bodmer, W