| QASAT | Quantitative Scale for Grading of Cardiovascular Autonomic Reflex Tests and Small Fibers from Skin Biopsies |
| COMPASS-31 | Composite Autonomic Symptom Score |
| SAS | Survey of Autonomic Symptoms |
| POTS | Postural Orthostatic Tachycardia Syndrome |
| ESC | European Society of Cardiology |
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