Although there is extensive overlap of ME/CFS and GWI symptoms, these are different diseases because ME/CFS has a sporadic onset and affects predominantly women, while GWI occurs in 25–32% of the cohort of predominantly young adult male military personnel deployed to the Persian Gulf theater of operations in 1990–1991 who were exposed to nerve agents (Sarin), pyridostigmine bromide pills, cholinesterase inhibitors, pesticides, oil well fire smoke, and other potentially pathological neurotoxic conditions (White et al., 2016; Maule et al., 2018). This evidence concerns the gene BCHE and myalgic encephalomeyelitis/chronic fatigue syndrome.