1. Department of Chemistry, Kent State University, Kent, Ohio 44242
2. Cardiff School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, U.K.
3. Gardden Road Surgery, Rhosllanerchrugog, Wrexham, Wales, LL14 2EN, U.K.
4. Stanford Synchrotron Radiation Laboratory, Stanford University, Menlo Park, California 94025
5. School of Biomedical Sciences, Kent State University, Kent, Ohio 44242