Fox Mark R, Gubler Christoph
Division of Gastroenterology and Hepatology, University Hospital Zürich and Zürich Integrative Human Physiology Group, Zürich University, Zürich, Switzerland.
Gastroenterology. 2009 Sep;137(3):e9-10. doi: 10.1053/j.gastro.2009.02.007. Epub 2009 Jul 29.