1. Myalgic encephalomyelitis/chronic fatigue syndrome: working case definition, diagnostic and treatment protocols;Carruthers;J CFS,2003
2. Myalgic encephalomyelitis and post viral fatigue states. The saga of royal free disease;Ramsey,1988
3. A community-based study of chronic fatigue syndrome;Jason;Arch Intern Med,1999
4. Prevalence and incidence of chronic fatigue syndrome in Wichita, Kansas;Reyes;Arch Intern Med,2003
5. Prevalence of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) in three regions of England: a repeated cross-sectional study in primary care;Nacul;BMC Med,2011