Submitted on: 24 April 2004.
Revised on: 20 May 2004.
Accepted on: 26 June 2004.
___________________Frontiers of Medicine---SPRINGER
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Submitted on: 18 January 2002.
Revised on: 13 April 2002.
Accepted on: 12 June 2002.
___________________Frontiers of Medicine---SPRINGER
Submitted on: 15 November 2010.
Revised on: 10 March 2011.
Accepted on: 26 March 2011.
___________________Frontiers of Medicine---SPRINGER
Submitted on: 11 February 2018.
Revised on: 09 March 2018.
Accepted on: 13 April 2018.
___________________Frontiers of Medicine---SPRINGER
Submitted on: 18 March 2008.
Revised on: 08 July 2008.
Accepted on: 25 July 2008.
___________________Frontiers of Medicine---SPRINGER