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Submitted on: 12 September 2019.
Revised on: 11 December 2019.
Accepted on: 22 December 2019.
___________________JOURNAL OF BIOMEDICAL SCIENCE---BMC
Submitted on: 28 July 2010.
Revised on: 30 August 2010.
Accepted on: 21 September 2010.
___________________JOURNAL OF BIOMEDICAL SCIENCE---BMC
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