Postural orthostatic tachycardia syndrome and other common autonomic disorders are not functional neurologic disorders - Svetlana Blitshteyn; Svetlana Blitshteyn; Glenn J. Treisman; Ilene S. Ruhoy; David S. Saperstein; Jill R. Schofield; Brent P. Goodman; Todd E. Davenport; Alexis C. Cutchins; Blair P. Grubb (Frontiers in Neurology)