1. University of Missouri, Columbia, USA
2. The Ohio State University, Columbus, USA
3. Case Western Reserve University, Cleveland, OH, USA
4. University of Wisconsin–Madison, USA
5. University of Minnesota, Minneapolis, USA
6. University of Nebraska Medical Center, Omaha, USA
7. The University of Iowa, Iowa City, USA
8. University of Kansas Medical Center, Kansas City, USA
9. University of Oklahoma Health Sciences Center, Oklahoma City, USA
10. University of San Diego, CA, USA
11. South Dakota State University, Brookings, USA
12. University of Michigan, Ann Arbor, USA