Fig. 1

The Sniffin’ Sticks 12-item identification test (Burghart Messtechnik GmbH, Wedel, Germany). Legend: This test consists of 12 pen-like odor dispensing devices, each displaying a different odor. The patient is asked each time to make a forced choice from a list of 4 descriptors. Total olfactory score ranges from 0 to 12 points, where 12 is the best score