1. Instituto de Fisica, Universidad de Guanajuato, León, Guanajuato, México
2. Fermilab, Batavia, USA
3. Columbia University, Nevis Laboratories, Irvington, USA
4. Department of Physics, Texas A&M University, College Station, USA
5. University of California, Davis, USA
6. University of Massachusetts, Amherst, USA
7. Lawrence Livermore National Laboratory, Livermore, USA
8. University of Texas, M.D. Anderson Cancer Center, Houston, USA
9. AT&T Research Laboratories, Murray Hill, USA
10. University of Utah, Salt Lake City, USA