What Persian Gulf War syndrome?

Recent reports of physical and neuropsychological syndromes putatively associated with service in the Persian Gulf War and ostensibly providing evidence for Gulf War Syndrome (GWS) are critically reviewed. Major methodological weaknesses are identified in the studies and it is contended that there is no solid evidence for GWS at this time. Suggestions are given for future investigations of symptoms associated with service during the Gulf War which may accurately lead to a tangible identification of a war-related illness entity.