1. Korean Nationwide Surveillance of Antimicrobial Resistance Group, WHONET Korea, Seoul, Korea.
2. Yonsei University College of Medicine, Seoul, Korea.
3. Catholic University, College of Medicine, Seoul, Korea.
4. College of Medicine, Keimyung University, Taegu, Korea.
5. Kwangju Christian Hospital, Kwangju, Korea.
6. College of Medicine, Dongguk University, Pohang, Korea.
7. College of Medicine, Pusan National University, Pusan, Korea.
8. Seoul National University College of Medicine, Seoul, Korea.
9. College of Medicine, Sungkyunkwan University, Seoul, Korea.
10. Yongdong Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
11. Ewha Womans University, Seoul, Korea.
12. Hallym University College of Medicine, Kangdong, Seoul, Korea.
13. Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
14. College of Medicine, Chonbuk National University, Chonju, Korea.
15. College of Medicine, Chosun University, Kwangju, Korea.
16. College of Medicine, Chung-Ang University, Seoul, Korea.
17. College of Medicine, Chung-Ang University, Yongsan, Seoul, Korea.
18. Hallym University College of Medicine, Chunchon, Korea.
19. Korea Veterans Hospital, Seoul, Korea.
20. Hallym University College of Medicine, Kangnam, Seoul, Korea.
21. Chunnam University Medical School, Kwangju, Korea.