Free searches of biomedical literature on this disorder are available from a service called PubMed. PubMed provides access to the Medline database, which contains abstracts and references for more than 11 million articles published in more than 4000 biomedical journals since 1966.

For a pre-formatted search that will retrieve the most recent English-language articles concerning human subjects, click selected PubMed articles .

You also can perform your own search of PubMed.

For information about obtaining full copies of the articles from a library, see Obtaining Biomedical Research Articles.