References:
[1] Karno M, Golding JM, Sorenson SB, Burnam MA. The epidemiology of obsessive-compulsive disorder in five US communities. Arch Gen Psychiatry. Dec 1988;45(12):1094-9.
[2] Antony, M. M.; F. Downie & R. P. Swinson. “Diagnostic issues and epidemiology in obsessive–compulsive disorder”. in Obsessive–Compulsive Disorder: Theory, Research, and Treatment, eds. M. M. Antony; S. Rachman; M. A. Richter & R. P. Swinson. New York: The Guilford Press, 1998, pp. 3-32.