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Baseline autonomic symptom assessment by COMPASS 31 questionnaire. OI indicates orthostatic intolerance domain; Vasomotor, vasomotor function domain; Secretomotor, secretomotor function domain; Gastrointestinal, gastrointestinal function domain; Bladder, bladder function domain; Pupillomotor, pupillomotor function domain; tot/COMPASS 31, total COMPASS 31 score. The scores are here represented as a percentage of the maximum value obtainable in each domain.
