Affiliation: | (1) Departments of Nuclear Medicine, Mokdong Hospital, Ewha Womans University School of Medicine, 911–1 Mok-Dong, Yangchun-Ku, Seoul, 158–710, Korea;(2) Brain and Neuroscience Major, Seoul National University, 28 Yeongeon-dong, Jongno-gu, Seoul, 110-744, Korea |