1 Otorhinolaryngology/Head & Neck Surgery, Uniformed Services University, Bethesda, MD 20814, USA; Walter Reed National Military Medical Center - Smell and Taste Disorders Center, Bethesda, MD, USA; Air Force Research Lab, Wright-Patterson, OH, USA. Electronic address: michael.xydakis@usuhs.edu.
2 National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.