Submitted on: 17 June 2008.
Revised on: 19 September 2008.
Accepted on: 21 October 2008.
___________________JOURNAL OF BIOSOCIAL SCIENCE---CAMBRIDGE UNIV PRESS
Submitted on: 29 January 2009.
Revised on: 13 May 2009.
Accepted on: 21 June 2009.
___________________JOURNAL OF BIOSOCIAL SCIENCE---CAMBRIDGE UNIV PRESS
Submitted on: 24 May 2012.
Revised on: 25 July 2012.
Accepted on: 13 August 2012.
___________________JOURNAL OF BIOSOCIAL SCIENCE---CAMBRIDGE UNIV PRESS
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Submitted on: 02 September 2011.
Revised on: 31 December 2011.
Accepted on: 03 February 2012.
___________________JOURNAL OF BIOSOCIAL SCIENCE---CAMBRIDGE UNIV PRESS
Submitted on: 08 May 2007.
Revised on: 07 June 2007.
Accepted on: 21 June 2007.
___________________JOURNAL OF BIOSOCIAL SCIENCE---CAMBRIDGE UNIV PRESS
Submitted on: 04 October 2004.
Revised on: 01 December 2004.
Accepted on: 13 December 2004.
___________________JOURNAL OF BIOSOCIAL SCIENCE---CAMBRIDGE UNIV PRESS
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Submitted on: 07 October 2003.
Revised on: 22 November 2003.
Accepted on: 31 December 2003.
___________________JOURNAL OF BIOSOCIAL SCIENCE---CAMBRIDGE UNIV PRESS