Submitted on: 28 May 2003.
Revised on: 07 July 2003.
Accepted on: 20 July 2003.
___________________Journal of the Korean Academy of Child and Adolescent Psychiatry
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Submitted on: 29 November 2008.
Revised on: 14 March 2009.
Accepted on: 25 April 2009.
___________________Journal of the Korean Academy of Child and Adolescent Psychiatry
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