Center for Regenerative Medicine, Research Support Center, Dokkyo Medical University, Mibu, Tochigi, JapanCenter for Regenerative Medicine, Research Support Center, Dokkyo Medical University, Mibu, Tochigi, JapanCenter for Regenerative Medicine, Department of Cardiovascular Medicine, Dokkyo Medical University, Mibu, Tochigi, JapanCenter for Regenerative Medicine, Department of Cardiovascular Medicine, Dokkyo Medical University, Mibu, Tochigi, JapanCenter for Regenerative Medicine, Research Support Center, Dokkyo Medical University, Mibu, Tochigi, Japan:Department of Cardiology, Koshigaya Hospital, Dokkyo Medical University, Koshigaya, Saitama, JapanCenter for Regenerative Medicine, Research Support Center, Department of Cardiovascular Medicine, Dokkyo Medical University, Mibu, Tochigi, JapanCenter for Regenerative Medicine, Dokkyo Medical University, Mibu, Tochigi, Japa