1. From the Department of Imaging Sciences (T.M.B., D.A.B., L.C., E.L., M.D.F., T.H.F., A.K.S.) and Clinical & Translational Science Institute (E.L.), University of Rochester Medical Center, 601 Elmwood Ave, Box 648, Rochester, NY 14642; and Department of Biomedical Engineering and Institute of Optics, University of Rochester, Rochester, NY (T.M.B.).