Go to google search engine and type in the above title. You should find a link to a really interesting website that lists all "rare" diseases. CFS and CFIDS are listed, as is Hashimoto's Syndrome, etc. Here is more about the site: Index of Rare Diseases The A-to-Z of Rare Diseases Rare Disease Database Read about more than 1,100 rare diseases. Organizational Database Find a support group or other source of help. Orphan Drug Designation Database Find out about new and experimental orphan products. This is a very interesting site to bookmark!