1. Geisel School of Medicine, Section of Neurological Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA
2. Departement of Surgery, Section of Neurological Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA
3. Departement of Pathology, Section of Neurological Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA