Karl Misulis is a physician and scientist at Vanderbilt University, specializing in Hospital Neurology and Biomedical Informatics. He has worked in biotechnical development including computer applications and electronics, and worked for a variety of public, private, and governmental organizations. He is the author of more than 20 books. Evan Johnson is a physician and scientist at Vanderbilt University, specializing in Movement disoders. His scientific expertise is in the field of neuro-imaging, with concentration on CT and MRI. His Master's research took place at The University of Texas M.D. Anderson Cancer Center, after which he worked for several years in research imaging groups both there and at the University of Texas at Houston Health Science Center before entering medical school.