1. IBM Research, Cambridge, MA, USA
2. Cornell University, Ithaca, NY, USA
3. University of Maryland, College Park, MD, USA
4. Stanford University, Palo Alto, CA, USA
5. University of Washington, Seattle, WA, USA
6. University of Michigan, Ann Arbor, MI, USA
7. Harvard University, Cambridge, MA, USA
8. University of Siegen, Siegen, Germany
9. National Taiwan Normal University, Taipei City, Taiwan Roc