1. Department of Pharmacology, Chungnam National University School of Medicine, Daejeon, Korea.
2. Department of Pharmacy, College of Pharmacy, Yeungnam University, Daegu, Korea.
3. Department of Pharmacy, College of Pharmacy, Seoul National University, Seoul, Korea.
4. Pulmonology Section, Department of Internal Medicine, Chungnam National University Hospital, Daejeon, Korea.