1. Korea Disease Control and Prevention Agency, Cheongju, Korea.
2. Wonju Public Health Center, Wonju, Korea.
3. Gangwon Center for Infectious Diseases, Chuncheon, Korea.
4. Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea.
5. Graduate School of Global Development and Entrepreneurship, Handong Global University, Pohang, Korea.