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Submitted on: 07 May 2017.
Revised on: 24 May 2017.
Accepted on: 04 June 2017.
Twin Research and Human Genetics
Submitted on: 03 April 2007.
Revised on: 11 April 2007.
Accepted on: 26 April 2007.
Twin Research and Human Genetics
Submitted on: 24 February 2005.
Revised on: 25 March 2005.
Accepted on: 12 April 2005.
Twin Research and Human Genetics
Submitted on: 01 January 1999.
Revised on: 29 January 1999.
Accepted on: 24 February 1999.
Twin Research and Human Genetics