1. Division of Cardiology, Department of Internal Medicine, The University of Texas Health Science Center at Houston, Houston, Texas, USA
2. Department of Radiology, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
3. Department of Neurosurgery, College of Medicine, University of Cincinnati, Cincinnati, Ohio, USA
4. Department of Biomedical Engineering, Colleges of Engineering and Medicine, University of Cincinnati, Cincinnati, Ohio, USA
5. Department of Biochemistry, Molecular Biology and Cell Biology, Northwestern University, Evanston, Illinois, USA