1. Harvard Medical School and Wellman, Center for Photomedicine; Massachusetts General Hospital; 65 Landsdowne St, UP-5 Cambridge Massachusetts 02139 USA
2. Institut für Angewandte Photophysik; Technische Universität Dresden; George-Bähr-Str. 1 01062 Dresden Germany
3. WCU Graduate School of Nanoscience and Technology; Korea Advanced Institute of Science and Technology; Daejeon Korea