Submitted on: 01 September 2010.
Revised on: 15 September 2010.
Accepted on: 03 October 2010.
Twin Research and Human Genetics
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Submitted on: 25 December 2010.
Revised on: 22 January 2011.
Accepted on: 17 February 2011.
Twin Research and Human Genetics
Submitted on: 21 August 2008.
Revised on: 27 September 2008.
Accepted on: 12 October 2008.
Twin Research and Human Genetics
Submitted on: 05 April 2007.
Revised on: 04 May 2007.
Accepted on: 31 May 2007.
Twin Research and Human Genetics
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Submitted on: 30 March 2004.
Revised on: 28 April 2004.
Accepted on: 07 May 2004.
Twin Research and Human Genetics
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