1. Biology Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
2. National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
3. Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York 11794-2580, United States
4. Labcyte Inc., 1190 Borregas Avenue, Sunnyvale, California 94089, United States