1. Massachusetts General Hospital and Harvard Medical School, Wellman Center for Photomedicine, Boston, Massachusetts 02114, United States
2. Middlebury College, Middlebury, Vermont 05753, United States
3. Department of Biomedical Engineering, Science and Technology Center, Tufts University, Medford, Massachusetts 02155, United States
4. Division of Health Sciences and Technology, Harvard University and Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States