1 Department of Neurological Surgery, Loyola University Stritch School of Medicine, Maywood, Illinois, USA. Electronic address: [email protected].
2 Department of Surgery, University of Illinois at Chicago, Chicago, Illinois, USA; Cancer Center, University of Illinois at Chicago, Chicago, Illinois, USA.
3 Chief, Section of Otolaryngology-Head and Neck Surgery, Jesse Brown VA Medical Center, Chicago, Illinois, USA; Department of Otolaryngology, University of Illinois at Chicago Medical College, Chicago, Illinois, USA.
4 Department of Otolaryngology, Loyola University Stritch School of Medicine, Maywood, Illinois, USA.
5 Department of Neurological Surgery, Loyola University Stritch School of Medicine, Maywood, Illinois, USA; Department of Otolaryngology, Loyola University Stritch School of Medicine, Maywood, Illinois, USA; Department of Neurological Surgery, Edward Hines, Jr. VA Hospital, Hines, Illinois, USA.