Submitted on: 24 January 2015.
Revised on: 24 April 2015.
Accepted on: 26 May 2015.
___________________International Journal of Noncommunicable Diseases
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Submitted on: 28 December 1999.
Revised on: 26 March 2000.
Accepted on: 26 April 2000.
___________________International Journal of Noncommunicable Diseases
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Submitted on: 30 May 2008.
Revised on: 14 September 2008.
Accepted on: 09 November 2008.
___________________International Journal of Noncommunicable Diseases
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Submitted on: 09 December 1999.
Revised on: 29 February 2000.
Accepted on: 03 April 2000.
___________________International Journal of Noncommunicable Diseases
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