Yukiomi Tsuji1, Dobromir Dobrev2. 1. Department of Molecular Physiology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan. Electronic address: yukiomitsuji@nagasaki-u.ac.jp. 2. Institute for Pharmacology, West German Heart and Vascular Centre, University of Duisburg-Essen, Essen, Germany.