1. Department of Pathology and Anatomical Sciences, 1 Hospital Drive, University of Missouri, Columbia, MI, 65212 U.S.A.,
2. Department of Geology and Geologic Engineering, 501 E. St. Joseph St., South Dakota School of Mines and Technology, Rapid City, SD, 57701 U.S.A.,
3. Dinosaur National Monument, 11625 E 1500 S, Jensen, UT, 84035 U.S.A., .