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Submitted on: 11 April 2003.
Revised on: 14 May 2003.
Accepted on: 10 June 2003.
Lancet Public Health
Submitted on: 10 October 2000.
Revised on: 05 November 2000.
Accepted on: 21 November 2000.
Lancet Public Health---ELSEVIER SCI LTD
Submitted on: 22 January 2011.
Revised on: 07 February 2011.
Accepted on: 07 March 2011.
Lancet Public Health---ELSEVIER SCI LTD
Submitted on: 11 July 2010.
Revised on: 21 July 2010.
Accepted on: 27 July 2010.
Lancet Public Health
Submitted on: 10 June 2007.
Revised on: 10 July 2007.
Accepted on: 20 July 2007.
Lancet Public Health---ELSEVIER SCI LTD
Submitted on: 15 November 1999.
Revised on: 27 December 1999.
Accepted on: 20 January 2000.
Lancet Public Health
Submitted on: 17 January 2008.
Revised on: 27 February 2008.
Accepted on: 12 March 2008.
Lancet Public Health
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