1. Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
2. National
Biomedical Center for Advanced ESR Technology, Department of Chemistry
and Chemical Biology, Cornell University, Ithaca, New York 14850, United States
3. Department
of Chemistry, University of Southern California, Los Angeles, California, 90089 United States
4. Pacira Pharmaceuticals, Inc., San Diego, California, 92121 United States