Submitted on: 21 October 2017.
Revised on: 21 November 2017.
Accepted on: 11 December 2017.
___________________Journal of Oral & Facial Pain and Headache
Submitted on: 17 October 2016.
Revised on: 10 November 2016.
Accepted on: 03 December 2016.
___________________Journal of Oral & Facial Pain and Headache
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Submitted on: 01 April 2011.
Revised on: 15 June 2011.
Accepted on: 06 August 2011.
___________________Journal of Oral & Facial Pain and Headache