SOURCES:
Cleveland Clinic: "Postural Orthostatic Tachycardia Syndrome (POTS)."
National Institute of Neurological Disorders and Stroke: "Postural Orthostatic Tachycardia Syndrome Information Page."
Johns Hopkins Medicine: "POTS" A Little-Known Cause of Extreme Fatigue."
Dysautonomia International: "Postural Orthostatic Tachycardia Syndrome," "General Information Brochure on Orthostatic Intolerance and Its Treatment."
Genetic and Rare Diseases Information Center: "Postural orthostatic tachycardia syndrome."
