Submitted on: 10 September 2008.
Revised on: 17 December 2008.
Accepted on: 05 February 2009.
___________________JOURNAL OF ADULT DEVELOPMENT---SPRINGER/PLENUM PUBLISHERS
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Submitted on: 19 September 2016.
Revised on: 14 January 2017.
Accepted on: 26 January 2017.
___________________JOURNAL OF ADULT DEVELOPMENT---SPRINGER/PLENUM PUBLISHERS