1. Department of Internal Medicine, Dongguk University College of Medicine, Goyang, Korea.
2. Division of Enteric Bacterial Infections, Center for Infectious Diseases, National Institute of Health, Seoul, Korea.
3. Department of Laboratory Medicine, Dongguk University College of Medicine, Goyang, Korea.
4. Department of Orthopedic Surgery, Dongguk University College of Medicine, Goyang, Korea.