1. Center for Engineering in Medicine, Department of Surgery, Massachusetts General Hospital, Harvard Medical School and Shriners Burn Hospital for Children, Boston, Massachusetts 02114; email (M.L.Y.):
2. Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey 08854;
3. Department of Experimental Oncology, Institute of Oncology Ljubljana, SI-1000 Ljubljana, Slovenia
4. Department of Biomedical Engineering, Faculty of Electrical Engineering, University of Ljubljana, SI-1000 Ljubljana, Slovenia;