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We are not alone.

 From Medscape:
http://gastroenterology.medscape.com/reuters/prof/2000/04/04.13/20000413rglt
005.html

"IBS affects up to 20% of the Western population, Novartis estimates.
Accounting for one in four visits to gastroenterologists each year, the
condition places an $8 billion strain on the healthcare system annually, it
added."

-vance