The Chronic Fatigue Syndrome (CFS) Service within the Essex Neuroscience's Centre has been developing since 1990. The service was established as a comprehensive diagnostic and management service in July 1994. From May 1990 to March 1998, 318 patients with CFS were admitted into the programme and since November 1994, 1189 patients seen as outpatients. A previous survey indicated a positive perceived change in level of ability following the inpatient programme for all levels of CFS from mild to very severe. Of those admitted since 1990, 14% (43/318) were severely affected (extremely restricted mobility) and 9% (29/318) very severely affected (totally bedbound). Most studies on CFS do not include the more severe expressions of the disease; the...