References

§ Abraham, H.D. Hallucinogen Persisting Perception Disorder (2008).

o http://drabraham.com/html/hppd.htm

§ DSM-IV TR

o www.dsmivtr.org

§ Hallucinogen Persisting Perception Disorder

o http://www.psychnet-uk.com/dsm_iv/hppd.htm

§ Photos are from:

o http://www.everystockphoto.com/photo.php?imageId=761725

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