Douglas Garstang , here is some important info on this very subject. There is a lot of information on this and IBS. There is another good article but their site is down at the moment. http://www.ibsgroup.org/other/usnews000403.htm http://www.med.unc.edu/wrkunits/2depts/med...aldisorders.htm http://www.med.unc.edu/wrkunits/2depts/med...rymediators.htm