1. Department of Neurological Surgery, Children’s Hospital Colorado, University of Colorado School of Medicine, Aurora, CO 80045, USA
2. Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC 29425, USA
3. College of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
4. Department of Family Medicine, AnMed Health Medical Center, Anderson, SC 29621, USA
5. Department of Neurological Surgery, Emory University School of Medicine, Atlanta, GA 30322, USA
6. Ralph Johnson VA Medical Center, Charleston, SC 29401, USA
7. Department of Neurological Surgery, Medical University of South Carolina, Charleston, SC 29425, USA