1. Department of Neurosurgery, Stanford Hospital, Stanford, California, United States
2. Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
3. Department of Neurological Surgery, University of California, Irvine, California, United States
4. The Neurosurgical Atlas, Carmel, Indiana, United States
5. Department of Neurological Surgery, Indiana University, Indianapolis, Indiana, United States