Submitted on: 02 April 2005.
Revised on: 16 April 2005.
Accepted on: 08 May 2005.
Preventive Medicine Reports---ELSEVIER
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Submitted on: 04 October 2010.
Revised on: 28 October 2010.
Accepted on: 12 November 2010.
Preventive Medicine Reports
Submitted on: 27 June 2021.
Revised on: 13 July 2021.
Accepted on: 29 July 2021.
Preventive Medicine Reports---ELSEVIER
Submitted on: 23 March 2012.
Revised on: 25 April 2012.
Accepted on: 13 May 2012.
Preventive Medicine Reports
Submitted on: 10 November 1998.
Revised on: 20 November 1998.
Accepted on: 10 December 1998.
Preventive Medicine Reports---ELSEVIER