We have organized this list by the criteria used by each organization, as determined by information within their website. While some organizations may not specifically state which criteria they use, most give information on what primer to use or how to get a diagnosis. We are categorizing them by what diagnosis or primer is used. For those that aren't clear they are in the "Undetermined" category.
ICC Organizations
CCC Organizations Canadian Consensus Criteria (labeled ME/CFS) precursor to ICC.