Affiliation: | 1.Department of Family Medicine, Center for American Indian Community Health,University of Kansas Medical Center,Kansas City,USA;2.Center for American Indian Community Health,University of Kansas Medical Center,Kansas City,USA;3.Department of Surgery,Washington University,St. Louis,USA;4.Department of Preventive Medicine & Public Health, MPH Program,University of Kansas Medical Center,Kansas City,USA;5.Department of Family Medicine,University of Kansas Medical Center,Kansas City,USA |