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Submitted on: 01 November 2008.
Revised on: 07 February 2009.
Accepted on: 20 February 2009.
___________________EPMA Journal---SPRINGER INT PUBL AG
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Submitted on: 24 March 2003.
Revised on: 07 June 2003.
Accepted on: 19 July 2003.
___________________EPMA Journal---SPRINGER INT PUBL AG
Submitted on: 04 December 2020.
Revised on: 12 March 2021.
Accepted on: 23 April 2021.
___________________EPMA Journal---SPRINGER INT PUBL AG
Submitted on: 04 April 2021.
Revised on: 23 May 2021.
Accepted on: 11 June 2021.
___________________EPMA Journal---SPRINGER INT PUBL AG
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Submitted on: 11 November 2017.
Revised on: 21 January 2018.
Accepted on: 28 February 2018.
___________________EPMA Journal---SPRINGER INT PUBL AG