1. Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
2. RIES, Hokkaido University, N20W10, Kita-Ward, Sapporo, Japan
3. Toray Research Center, Inc., Sonoyama 3-3-7, Otsu, 520-8567 Shiga Japan