1. Division of Gastroenterology and Hepatology, Stanford University School of Medicine, Stanford, California;
2. AfaSci Research Laboratory, Redwood City, California;
3. Genentech, Inc., South San Francisco, California
4. Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas;
5. Department of Computer Science and Microsystems Technology, UAS, Kaiserlautern, Germany; and