Submitted on: 06 January 1999.
Revised on: 24 February 1999.
Accepted on: 24 March 1999.
___________________Annual Review of Public Health
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http://reply.papertrans.cn/1/20/1970/1970-33.png
Submitted on: 15 August 2017.
Revised on: 04 September 2017.
Accepted on: 24 September 2017.
___________________Annual Review of Public Health
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Submitted on: 24 January 2017.
Revised on: 29 March 2017.
Accepted on: 07 May 2017.
___________________Annual Review of Public Health