1. Department of Preventive Medicine, Armed Forces Medical Command, Seongnam, Korea.
2. Preventive Medicine Program, Graduate School of Public Health, Seoul National University, Seoul, Korea.
3. International Peace Supporting Standby Force, Ministry of National Defense, Seoul, Korea.
4. Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea.
5. Drug Safety Monitoring Center, Seoul National University Hospital, Seoul, Korea.
6. Department of Preventive Medicine, Korea University College of Medicine, Seoul, Korea.
7. Korean Institute of Tuberculosis, Seoul, Korea.