1. University of South Dakota, Vermillion, SD, USA
2. University of North Carolina at Greensboro, Greensboro, NC, USA
3. University of Arizona, Tucson, AZ, USA
4. University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
5. Current affiliation: University of Pittsburgh at Johnstown, Johnstown, PA, USA
6. University of Chicago, Chicago, IL, USA
7. Current affiliation: University of Detroit Mercy, Detroit, MI, USA & University of Portsmouth, Portsmouth, UK
8. Duke University, Durham, NC, USA