- less than 18 years of age. - active sinus infection. - new diagnosis of untreated crs. - prior diagnosis of dementia or parkinson's disease. - prior head trauma or neurosurgical procedure resulting in olfactory loss. - patients who do not speak or read english. - patients unable to understand and sign the study consent.

- less than 18 years of age. - active sinus infection. - new diagnosis of untreated crs. - prior diagnosis of dementia or parkinson's disease. - prior head trauma or neurosurgical procedure resulting in olfactory loss. - patients who do not speak or read english. - patients unable to understand and sign the study consent.