Given the history provided, it was unanimous among medical providers, including the independent medical examiner, that causal relationship existed. Upon taking testimony of the medical providers, the providers conceded the claimant suffered other medical conditions which may be causing her to be symptomatic but are not necessarily related to work. Then, upon taking lay witness testimony, the various witnesses testified that it was impossible for the claimant to have been exposed to the fuel additive, as she never came in contact with it and the vents are not connected to the gas tank, so it would be impossible for it to have come out of the vents.