1. Department of Pharmacology, College of Pharmacy, Seoul National University, Seoul 151-742 and Center for Biofunctional Molecules, POSTECH, Pohang 790-784, Korea
2. Division of Pulmonology, Department of Internal Medicine, Soon Chun Hyang University Hospital, Seoul 140-743, Korea
3. Department of Genetic Engineering, Hallym University, Chunchon 200-702, Korea