1. Comprehensive Research Facilities for Advanced Medical Science, Research Center for Advanced Medical Science, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
2. Center of Regenerative Medicine, Dokkyo Medical University Hospital, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
3. Department of Cardiovascular Medicine, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan
4. Department of Endocrinology and Metabolism, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan