In a statistical review of published research on chronic fatigue syndrome, researchers found that the literature cited in review articles was influenced by the author’s medical discipline and by the country in which he or she resided. In other words, authors from laboratory-based disciplines cited mostly references from laboratory studies, while authors from psychiatry-based disciplines cited psychiatric literature; American reviewers cited American studies primarily, and the same was the case with British authors. These researchers suggested that the choice of articles to cite might perpetuate pre-existing biases in a discussion of a condition such as CFS.
Joyce, J., Rabe-Hesketh, S., and Wessely, S. (1998, July 15). Reviewing the reviews: The example of chronic fatigue syndrome. Journal of the American Medical Association, 280, 264–266.