“…The failure of both the English and Australian reports to mention other important endocrine abnormalities of CFS represents a serious omission, especially because Addison's disease, a classic endocrine disorder, is the medical condition that resembles CFS far more closely than all the ‘overlapping diagnoses’[2] discussed in the Australian guidelines. Twenty clinical features shared by CFS and Addison's disease had already been listed in this journal in 1997 [3]. There is evidence now that those conditions share 42 clinical features [4–7], including abrupt onset, over‐representation of middle‐aged women, and all the signs and symptoms listed in the original [8] and in the revised [9] criteria for CFS, namely, chronic fatigue, postexertional debilitation, weakness, low‐grade fever, enlarged lymph nodes, muscular aches, joint pains, flu‐like malaise, sore throat, headaches and disturbed sleep [4,5].…”