(Sorry if I'm suggesting too many changes  -) ) As part of the "History of IBS" request from Agne, I was thinking of describing how idea of the cause has changed over time.  So this would become the "What Causes IBS?" section.  Right now, "Pathophysiology" (oh, that is hard to spell) is a mixture of causes and co-morbidities.  So I'd suggest splitting Pathophysiology into "What Causes IBS?" and "What Conditions Accompany IBS? (Co-morbidities)"  I probably won't get to this for a week or so.  I'm working on another page on the medical history of Emerging Gastrointestinal Pathogens like H. Pylori, Giardia, and Enterotoxic E Coli.  Thanks!