Submitted on: 10 December 2016.
Revised on: 22 February 2017.
Accepted on: 01 April 2017.
___________________Animal Frontiers---OXFORD UNIV PRESS INC
Submitted on: 16 March 2017.
Revised on: 26 June 2017.
Accepted on: 01 August 2017.
___________________Animal Frontiers---OXFORD UNIV PRESS INC
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Submitted on: 16 May 2003.
Revised on: 06 August 2003.
Accepted on: 27 September 2003.
___________________Animal Frontiers---OXFORD UNIV PRESS INC
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Submitted on: 10 May 2013.
Revised on: 31 August 2013.
Accepted on: 08 October 2013.
___________________Animal Frontiers---OXFORD UNIV PRESS INC
Submitted on: 19 October 1999.
Revised on: 18 January 2000.
Accepted on: 14 February 2000.
___________________Animal Frontiers---OXFORD UNIV PRESS INC
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