1. Department of Internal Medicine, National Medical Center, Seoul, Korea
2. Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea
3. Cancer Research Institute, Seoul National University, Seoul, Korea
4. Interdisciplinary Program in Cancer Biology, Seoul National University College of Medicine, Seoul, Korea
5. Genomic Medicine Institute, Seoul National University College of Medicine, Seoul, Korea
6. Department of Biomedical Science, Seoul National University Graduate School, Seoul, Korea
7. Integrated Major in Innovative Medical Science, Seoul National University College of Medicine, Seoul, Korea
8. Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
9. Department of Internal Medicine, Ewha Womans University Seoul Hospital, Ewha Womans University College of Medicine, Seoul, Korea
10. Department of Biochemistry, Ewha Womans University College of Medicine, Seoul, Korea
11. Department of Microbiology, School of Medicine, Kyung Hee University, Seoul, Korea
12. Department of Internal Medicine, Kyung Hee University School of Medicine, Seoul, Korea
13. Department of Epidemiology, Tulane University, New Orleans, Louisiana
14. Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania