1. Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan, Republic of China
2. School of Medicine, National Yang-Ming University, Taipei, Taiwan
3. Department of Radiation Oncology, University of Virginia, Charlottesville, Virginia
4. Department of Radiation Oncology, University of Toronto, Sunnybrook Odette Cancer Centre, Toronto, Ontario, Canada
5. Department of Neurosurgery, University of California Los Angeles, Los Angeles, California
6. Radiotherapy unit, Radiosurgery dep Istituto neurologico Carlo Besta Foundation, Milan, Italy
7. Department of Neurosurgery, Tokyo Women's Medical University, Toyko, Japan
8. Neurosurgery Service and Gamma Knife Center, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
9. Division Physics, Department of Radiation Oncology, University of California San Francisco, San Francisco, California
10. Department of Radiosurgery and Functional Neurosurgery, Ruber International Hospital, Madrid, Spain
11. Division Physics, National Hospital for Neurology and Neurosurgery, London, UK
12. Department of Functional Neurosurgery, Timone University Hospital, Aix-Marseille University, Marseille, France
13. Department of Radiation Oncology, Stony Brook University, Stony Brook, New York
14. Department of Radiation Oncology, VU University Medical Center, Amsterdam, The Netherlands
15. Department of Neurological Surgery, University of Virginia, Charlottesville, VA, USA