11.   A more serious problem developed when Flea became ill, a condition diagnosed as chronic fatigue syndrome.

12.   A national patient advocacy group estimates chronic fatigue syndrome affects half a million Americans.

13.   A year later, Piper took nine months off for an illness akin to chronic fatigue syndrome.

14.   All the while, they said, she suffered from chronic fatigue syndrome.

15.   But any message board on America Online, from colon cancer to chronic fatigue, contains postings from people trying to diagnose themselves.

16.   But chronic fatigue sufferers continue to search for one.

17.   But doctors here say that the explosion of chronic tiredness and of chronic fatigue syndrome in particular is a distinctly post-boom phenomenon.

18.   But for a woman who lives with chronic fatigue syndrome and has endured no fewer than a dozen knee operations, she insists that she never has felt better.

19.   But he also said that people who have chronic fatigue syndrome have symptoms like those of people with depression.

20.   But many doctors, Thompson said, also consider chronic fatigue both treatable and non-fatal.