Shogo Matsui1, Tatsuya Maruhashi1, Yasuki Kihara1, Yukihito Higashi2,3. 1. Department of Cardiovascular Medicine, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan. 2. Division of Regeneration and Medicine, Medical Center for Translational and Clinical Research, Hiroshima University Hospital, Hiroshima, Japan. 3. Department of Cardiovascular Regeneration and Medicine, Research Institute for Radiation Biology and Medicine, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Japan.