1. Department of Preventive Medicine, Korea University College of Medicine, Seoul, Republic of Korea
2. Radiation Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
3. Department of Nuclear Medicine, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
4. Department of Nuclear Medicine, Pusan National University College of Medicine, Yangsan, Republic of Korea
5. BioMedical Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea