Yuichi Fujii1, Hiroki Teragawa1, Yasuki Kihara2, Yukihito Higashi3. 1. Department of Cardiovascular Medicine, JR Hiroshima Hospital, Hiroshima, Japan. 2. Department of Cardiovascular Medicine, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan. 3. Department of Human Genetics, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.