1. Massachusetts General Hospital, Wellman Center for Photomedicine, Boston, Massachusetts 02114
2. Physical Sciences Inc., Andover, Massachusetts 01810
3. Massachusetts General Hospital, Department of Dermatology, Boston, Massachusetts 02114
4. Massachusetts General Hospital, Biostatistics Department, Boston, Massachusetts 02114
5. Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire 03755