D. G. Perdue, Perkins, C., Jackson-Thompson, J., Coughlin, S. S., Ahmed, F., Haverkamp, D. S., and Jim, M. A.,
“Regional differences in colorectal cancer incidence, stage, and subsite among American Indians and Alaska Natives, 1999-2004”,
CancerCancer, vol. 113, pp. 1179-90, 2008.