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Submitted on: 31 May 2010.
Revised on: 26 July 2010.
Accepted on: 25 August 2010.
___________________JOURNAL OF COMMUNITY HEALTH---SPRINGER
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Submitted on: 21 December 2016.
Revised on: 04 April 2017.
Accepted on: 25 April 2017.
___________________JOURNAL OF COMMUNITY HEALTH---SPRINGER
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Submitted on: 22 May 2011.
Revised on: 08 July 2011.
Accepted on: 21 July 2011.
___________________JOURNAL OF COMMUNITY HEALTH---SPRINGER
Submitted on: 26 September 1998.
Revised on: 16 January 1999.
Accepted on: 06 February 1999.
___________________JOURNAL OF COMMUNITY HEALTH---SPRINGER