1. Division of Cardiology, Department of Internal Medicine, Severance Cardiovascular Hospital, Yonsei University College of Medicine, Seoul, Korea.
2. Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Biochemistry and Molecular Biology, Yonsei University, Seoul, Korea.
4. Graduate School of Medical Science and Engineering, KAIST, Daejeon, Korea.
5. Department of Biomedical Engineering, Duke University, Durham, NC, USA.