The CLE-test scoring system was established based on evaluations of video recordings from both patients and symptom-negative controls who were examined with the CLE-test. The CLE-test scoring system encompasses separate assessments of the extent of medial rotation of the aryepiglottic folds and adduction of the vocal folds scored in representative respiratory cycles at two different points in time during the exercise session; i.e. at a moderate effort (when changing from walking to running on the treadmill) and at maximal effort (shortly before exhaustion). Adduction is graded from 0 (neutral position or abduction) to a maximum score of 3. This set-up establishes four sub-scores ranging from 0 to 3, i.e. glottic and supraglottic adduction at moderate (A and B), and maximal exercise (C and D). The sum score (E) may finally be categorized into three clusters: 0-2 (normal) and 3-4 (moderate) and 5 or more (severe).