Submitted on: 12 October 2000.
Revised on: 31 October 2000.
Accepted on: 05 November 2000.
Korean Journal of Family Medicine
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Submitted on: 06 March 2006.
Revised on: 07 April 2006.
Accepted on: 29 April 2006.
Korean Journal of Family Medicine
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Submitted on: 29 December 2015.
Revised on: 10 February 2016.
Accepted on: 26 February 2016.
Korean Journal of Family Medicine
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Submitted on: 21 August 2008.
Revised on: 06 September 2008.
Accepted on: 28 September 2008.
Korean Journal of Family Medicine