1. Department of Nuclear Medicine; Chonnam National University Medical School and Hospital, 42 Jebong-no, Donggu; Gwangju 501-757 Republic of Korea
2. Department of Chemistry; Sogang University, 1 Shinsudong Mapogu; Seoul 121-742 Republic of Korea
3. Research Institute of Labeling; FutureChem Co., Ltd; Seoul 04782 Republic of Korea