1. Clinical Trials Center, Chungnam National University Hospital, Daejeon 35015, Korea.
2. Department of Medical Science, Chungnam National University College of Medicine, Daejeon 35015, Korea.
3. Korea United Pharm. Inc., Seoul 06116, Korea.
4. Caleb Multilab. Inc., Seoul 06745, Korea.
5. Department of Pharmacology, Chungnam National University College of Medicine, Daejeon 35015, Korea.
6. Department of Family Medicine, Chungnam National University Hospital, Daejeon 35015, Korea.