21. Almand, B. , J. I. Clark, E. Nikitina, J. van Beynen, N. R. English, S. C. Knight, D. P. Carbone, D. I. Gabrilovich. 2001. Increased production of immature myeloid cells in cancer patients: a mechanism of immunosuppression in cancer. J. Immunol. 166: 678- 689. 22. Diaz-Montero, C. M., M. L. Salem, M. I. Nishimura, E. Garrett -Mayer, D. J. Cole, A. J. Montero.