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Submitted on: 21 March 2016.
Revised on: 26 May 2016.
Accepted on: 03 July 2016.
___________________JOURNAL OF BIOMEDICAL SCIENCE---BMC
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Submitted on: 24 July 2004.
Revised on: 08 November 2004.
Accepted on: 13 December 2004.
___________________JOURNAL OF BIOMEDICAL SCIENCE---BMC
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