Does exposure to chemicals play a role in the onset of CFS?

The team at the University of Newcastle/University of Sydney have reported (in the Medical Journal of Australia) finding elevated levels of certain pesticides in some people with CFS. The significance of this finding remains unknown. Apart from this, there are no published studies which have looked at the role of chemicals (eg. solvents, pesticides) or heavy metals in the onset or continuation of CFS. It has been stated by a number of researchers that chemical exposure may play a role in triggering CFS.