1. Department of Neurosurgery, Baylor Scott and White Medical Center, Temple, TX 76508, USA
2. Department of Neurology, Baylor Scott and White Medical Center, Temple, TX 76508, USA
3. Department of Pathology, Baylor Scott and White Medical Center, Temple, TX 76508, USA
4. Department of Surgery, Texas A&M University College of Medicine, Temple, TX 76508, USA