- active cigarette smoker - chronic rhinosinusitis - head trauma with loss of consciousness - inability to read/understand english - previous hyposmia/anosmia complaint - pregnancy - previous sinus - skull base or brain surgery - current participation in another clinical trial at the time of initial visit

- active cigarette smoker - chronic rhinosinusitis - head trauma with loss of consciousness - inability to read/understand english - previous hyposmia/anosmia complaint - pregnancy - previous sinus - skull base or brain surgery - current participation in another clinical trial at the time of initial visit