1. Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
2. School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA.
3. Department of Otolaryngology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
4. Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
5. Department of Psychology, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.