1. Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois.
2. Research Services, Edward Hines Jr. VA Hospital, Chicago, Illinois.
3. Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri.
4. Wake Forest Institute of Regenerative Medicine, Winston-Salem, North Carolina.
5. National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York.