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Submitted on: 17 December 2002.
Revised on: 25 February 2003.
Accepted on: 22 April 2003.
___________________JOURNAL OF PUBLIC HEALTH DENTISTRY
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Submitted on: 07 May 2007.
Revised on: 03 September 2007.
Accepted on: 15 October 2007.
___________________JOURNAL OF PUBLIC HEALTH DENTISTRY