1. Department of Neurosurgery, Seoul National University College of Medicine, Seoul 110-744, Korea
2. Cancer Research Institute, Seoul National University College of Medicine, Seoul 110-744, Korea
3. Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 110-744, Korea
4. Center for Regenerative Medicine, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon 406-840, Korea
5. Department of Anatomy and Cell Biology, Gachon University Medical School, Incheon 406-840, Korea
6. Clinical Research Institute, Gyeongsang National University Hospital, Jinju 660-702, Korea
7. Innovative Research Institute for Cell Therapy (IRICT), Seoul National University Hospital, Seoul 110-744, Korea
8. Department of Obstetrics & Gynecology, Seoul National University Hospital, Seoul 110-744, Korea
9. Department of Neurosurgery, Mayo Clinic, USA
10. Division of Molecular and Life Science, Integrative Bioscience & Biotechnology, Pohang University of Science and Technology, Pohang 790-784, Korea
11. Laboratory for Vascular Biology and Stem Cell, Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-338, Korea
12. Department of Therapeutic Radiology-Radiation Oncology, University of Minnesota Medical School, Minneapolis, USA