1. In vivo Multifunctional Magnetic Resonance (IMMR) Center, Robert C. Byrd Health Sciences Center; West Virginia University; Morgantown, West Virginia 26506 USA
2. Department of Biochemistry; West Virginia University; School of Medicine; Morgantown WV 26506 USA
3. Lane Department of Computer Science and Electrical Engineering; West Virginia University; Morgantown WV 26505 USA
4. Current address: Department of Pharmaceutical Sciences; West Virginia University; School of Pharmacy; Morgantown WV 26506 USA