1. Department of Nuclear Medicine; Kyungpook National University Hospital; Daegu 702-210 South Korea
2. Leading-edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease; Kyungpook National University Hospital; Daegu 702-210 South Korea
3. Department of Pathology; Kyungpook National University Hospital; Daegu 702-210 South Korea
4. KU-KIST Graduate School of Converging Science and Technology; Korea University; Seoul 02841 South Korea
5. Daegu-Gyeongbuk Medical Innovation Foundation; Daegu 360-4 South Korea