1. Clinical Trials Center, Chungnam National University Hospital, Daejeon, Korea.
2. Center for Infectious Diseases Control, Korea Centers for Disease Control and Prevention, Cheongju 28159, Korea.
3. Huons Co., Ltd, Seongnam 13486, Korea.
4. Department of Medical Science, College of Medicine, Chungnam National University, Daejeon 34134, Korea.
5. Department of Pharmacology, College of Medicine, Chungnam National University, Daejeon 34134, Korea.