1. Department of Otolaryngology–Head and Neck Surgery, Stanford University, Stanford, California, USA
2. Division of Otolaryngology–Head and Neck Surgery, Department of Surgery, University of Calgary, Calgary, Canada
3. Department of Computer Science, University of Calgary, Calgary, Canada
4. Department of Computer Science, Stanford University, Stanford, California, USA
5. Division of Clinical Anatomy, Department of Surgery, Stanford University School of Medicine, Stanford, California, USA