Submitted on: 15 November 2004.
Revised on: 03 March 2005.
Accepted on: 03 April 2005.
___________________AGEING & SOCIETY---CAMBRIDGE UNIV PRESS
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Submitted on: 15 August 2002.
Revised on: 23 November 2002.
Accepted on: 10 January 2003.
___________________AGEING & SOCIETY---CAMBRIDGE UNIV PRESS
Submitted on: 28 May 2011.
Revised on: 04 September 2011.
Accepted on: 14 October 2011.
___________________AGEING & SOCIETY---CAMBRIDGE UNIV PRESS