Submitted on: 02 February 2000.
Revised on: 02 March 2000.
Accepted on: 26 March 2000.
___________________BRITISH JOURNAL OF NUTRITION---CAMBRIDGE UNIV PRESS
Submitted on: 26 September 2003.
Revised on: 23 December 2003.
Accepted on: 20 February 2004.
___________________BRITISH JOURNAL OF NUTRITION---CAMBRIDGE UNIV PRESS
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Submitted on: 15 August 2001.
Revised on: 26 November 2001.
Accepted on: 11 January 2002.
___________________BRITISH JOURNAL OF NUTRITION---CAMBRIDGE UNIV PRESS