1. Department of Electrical and Computer Engineering; University of Illinois at Urbana-Champaign; Urbana Illinois USA
2. Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign; Urbana Illinois USA
3. Pittsburgh NMR Center for Biomedical Research; Carnegie Mellon University; Pittsburgh Pennsylvania USA
4. Department of Biological Sciences; Carnegie Mellon University; Pittsburgh Pennsylvania USA