Introduction to clinical aspects of the autonomic nervous system. Volume 2 [electronic resource] / Otto Appenzeller, University of New Mexico, Albuquerque, NM, United States, New Mexico Health Enhancement and Marathon Clinics Research Foundation, Albuquerque, NM, United States, Guillaume J. Lamotte, Department of Neurology, Movement Disorders, and Autonomic Disorders, the University of Utah, Salt Lake City, UT, United States, Elizabeth A. Coon, Department of Neurology, Autonomic Disorders, Mayo Clinic, Rochester, MN, United States.