1. Population Health Science Program, Southern Illinois University School of Medicine, 801 N. Rutledge St., Springfield, IL 62794-9664, USA.
2. Department of Crop Sciences, University of Illinois, W-201B Turner Hall, 1102 S Goodwin Ave., Urbana IL 61801, USA.
3. Center for Clinical Research, Southern Illinois University School of Medicine, 801 N. Rutledge St., Springfield, IL 62794-9664, USA.
4. Depts. of Anthropology & Animal Biology, Carl R. Woese Institute for Genomic Biology, University of Illinois Urbana-Champaign, 209F Davenport Hall, 607 Matthews Ave., Urbana, IL 61801, USA.
5. Department of History, Southern Illinois University, 1000 Faner Drive, Rm 3374, Carbondale, IL 62901, USA.