The article presents an index related to referees, who provide the authors with valuable criticism on the content and form of the papers that appear in the 2005 issue of the "Cancer Immunology Immunotherapy." Some of the referees are H. Aguila, E. Alvarez, R.J. Amato, E. Angevin, V.N. Anisimov, P. Arbuthnot, M. Aringer, H.K. Avraham, U. Bachrach and M. Baer.