The government has so far refused to acknowledge that Gulf War syndrome exists.

BBC: NEWS | Health | 'Fears over Gulf War chemicals'

Another paper in the Annals of Internal Medicine calls chronic Lyme a "functional somatic syndrome, " similar to other nebulous ailments like Gulf War Syndrome, chronic fatigue and fibromyalgia.

FORBES: Lyme Inc.

But the MoD says it is too early to say that the combination of vaccines and anti-nerve tablets necessarily caused negative symptoms, or was responsible for the so-called Gulf War syndrome.

BBC: The Gulf War syndrome: fact or fantasy?

"Gulf War illness isn't some imaginary syndrome, " said Ken Robinson, the senior intelligence officer for the initial Department of Defense investigation into Gulf War illness in 1996-97.

CNN: Gulf War illness is real, new federal report says