1. Department of Biomedical Engineering; University at Buffalo, State University of New York; Buffalo NY 14260 USA
2. Department of Radiology and Medical Physics; University of Wisconsin; Madison WI 53705 USA
3. Department of Creative IT Engineering and Department of Electrical Engineering; POSTECH; Pohang Korea
4. School of Chemical Engineering and Technology; Harbin Institute of Technology; Harbin P.R. China
5. Institute for Lasers Photonics and Biophotonics, Department of Chemistry; University at Buffalo, State University of New York; Buffalo NY 14260 USA