1. Department of Preventive Medicine, College of Medicine, Dongguk University, Gyeongju, Korea.
2. Institute of Health Services Research, Yonsei University, Seoul, Korea.
3. Center for Global Health and Mongan Institute, Massachusetts General Hospital, Boston, MA, USA.
4. Harvard Medical School, Boston, MA, USA.
5. Department of Pediatrics, Severance Children’s Hospital, Endocrine Research Institute, Yonsei University College of Medicine, Seoul, Korea.
6. Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea.
7. Department of Policy Analysis and Management, Cornell University, Ithaca, New York, USA.