1. University of British Columbia, Vancouver, BC, Canada
2. University of Calgary, Calgary, BC, Canada
3. International Computer Science Institute, Berkeley, CA, USA
4. University of California, Berkeley, Berkeley, CA, USA
5. Good Research, Inc, El Cerrito, CA, USA
6. Good Research, Inc., El Cerrito, CA, USA
7. University of California, Berkeley & International Computer Science Institute, Berkeley, CA, USA