Submitted on: 10 August 1999.
Revised on: 13 September 1999.
Accepted on: 23 October 1999.
___________________Journal of Oral & Facial Pain and Headache
Submitted on: 24 May 2006.
Revised on: 23 June 2006.
Accepted on: 07 July 2006.
___________________Journal of Oral & Facial Pain and Headache
http://reply.papertrans.cn/2/185/18477/18477-23.png
http://reply.papertrans.cn/2/185/18477/18477-24.png
http://reply.papertrans.cn/2/185/18477/18477-25.png
http://reply.papertrans.cn/2/185/18477/18477-26.png
http://reply.papertrans.cn/2/185/18477/18477-27.png
http://reply.papertrans.cn/2/185/18477/18477-28.png
http://reply.papertrans.cn/2/185/18477/18477-29.png
http://reply.papertrans.cn/2/185/18477/18477-30.png