1. From the Department of Physiology (B.K., J.K., Y.M.B., S.I.C.), College of Medicine, Konkuk University, Choongju, Korea; Department of Physiology (S.C.K.), College of Medicine, Kwandong University, Kangneung, Korea; Department of Pharmacology (J. Y. J., J.C.P., H.Y.A.), College of Medicine, Chungbuk National University, Cheongju, Korea.