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http://reply.papertrans.cn/2/111/11064/11064-32.png
Submitted on: 14 September 2004.
Revised on: 06 December 2004.
Accepted on: 18 December 2004.
___________________HEALTH---SAGE PUBLICATIONS LTD
Submitted on: 25 February 2014.
Revised on: 25 April 2014.
Accepted on: 15 June 2014.
___________________HEALTH---SAGE PUBLICATIONS LTD
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Submitted on: 22 June 2015.
Revised on: 18 August 2015.
Accepted on: 24 September 2015.
___________________HEALTH---SAGE PUBLICATIONS LTD