Submitted on: 01 March 1999.
Revised on: 09 May 1999.
Accepted on: 30 June 1999.
___________________AIMS Biophysics---AMER INST MATHEMATICAL SCIENCES-AIMS
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Submitted on: 27 June 2007.
Revised on: 17 September 2007.
Accepted on: 24 October 2007.
___________________AIMS Biophysics---AMER INST MATHEMATICAL SCIENCES-AIMS
Submitted on: 06 July 2006.
Revised on: 26 October 2006.
Accepted on: 08 November 2006.
___________________AIMS Biophysics---AMER INST MATHEMATICAL SCIENCES-AIMS
Submitted on: 18 January 2020.
Revised on: 20 March 2020.
Accepted on: 13 April 2020.
___________________AIMS Biophysics---AMER INST MATHEMATICAL SCIENCES-AIMS
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Submitted on: 09 October 2007.
Revised on: 08 December 2007.
Accepted on: 23 January 2008.
___________________AIMS Biophysics---AMER INST MATHEMATICAL SCIENCES-AIMS
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Submitted on: 17 July 2013.
Revised on: 26 September 2013.
Accepted on: 19 November 2013.
___________________AIMS Biophysics---AMER INST MATHEMATICAL SCIENCES-AIMS