Submitted on: 09 August 2001.
Revised on: 03 September 2001.
Accepted on: 28 September 2001.
___________________Journal of the World Federation of Orthodontists
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Submitted on: 07 April 2004.
Revised on: 15 June 2004.
Accepted on: 01 August 2004.
___________________Journal of the World Federation of Orthodontists
Submitted on: 26 November 2014.
Revised on: 17 January 2015.
Accepted on: 16 February 2015.
___________________Journal of the World Federation of Orthodontists
http://reply.papertrans.cn/2/199/19883/19883-15.png
Submitted on: 24 January 1998.
Revised on: 10 May 1998.
Accepted on: 08 June 1998.
___________________Journal of the World Federation of Orthodontists
http://reply.papertrans.cn/2/199/19883/19883-17.png
Submitted on: 20 April 2018.
Revised on: 01 June 2018.
Accepted on: 03 July 2018.
___________________Journal of the World Federation of Orthodontists
http://reply.papertrans.cn/2/199/19883/19883-19.png
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