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Submitted on: 09 June 2008.
Revised on: 12 July 2008.
Accepted on: 23 August 2008.
___________________Current Geriatrics Reports---SPRINGER
Submitted on: 23 May 2016.
Revised on: 05 September 2016.
Accepted on: 22 September 2016.
___________________Current Geriatrics Reports---SPRINGER
Submitted on: 15 May 2002.
Revised on: 20 June 2002.
Accepted on: 23 July 2002.
___________________Current Geriatrics Reports---SPRINGER
Submitted on: 10 May 2000.
Revised on: 01 July 2000.
Accepted on: 30 July 2000.
___________________Current Geriatrics Reports---SPRINGER