Dr. Kenneth Koch is a Professor of Internal Medicine and Head, Section onGastroenterology at Wake Forest School of Medicine. He completed hisundergraduate and medical school degrees at the University of Iowa,Internal Medicine training at Milton S. Hershey Medical Center ofPennsylvania State University, and fellowship in gastroenterology at theUniversity of Florida. Dr. Koch's clinical and research interests include the pathophysiology of nausea and vomiting, gastroparesis, gastric dysrhythmias, and functional dyspepsia. He has authored numerous original works, chapters, and other contributions to the GI literature. Dr. Koch was selected as one of the "Best Doctors in America."Dr. William Hasler is a Professor in the Division of Gastroenterology in the Department of Internal Medicine at the University of Michigan Health System. He completed his undergraduate degree at the Massachusetts Institute of Technology, his medical school training at the University of Pennsylvania, and his internal medicine residency and gastroenterology fellowship at the University of Michigan. Dr. Hasler’s clinical practice focuses on care of gastrointestinal dysmotility including gastroparesis, cyclic vomiting, intestinal pseudoobstruction, and chronic unexplained nausea and vomiting. His research interests center on the pathophysiology of nausea and vomiting and gut transit and sensory abnormalities. Dr. Hasler has authored numerous original works on these areas.