Dong Soo Lee1,2,3, Yun-Sang Lee1,3, Jae Sung Lee1,3, Min Seok Suh1,2. 1. 1Nuclear Medicine, College of Medicine, Seoul National University, Seoul, South Korea. 2. 2Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, South Korea. 3. 3Nuclear Medicine, Seoul National University Hospital, Seoul, South Korea.