Submitted on: 13 September 2014.
Revised on: 06 October 2014.
Accepted on: 04 December 2014.
___________________Journal of Pain Research---DOVE MEDICAL PRESS LTD
Submitted on: 23 October 2008.
Revised on: 24 November 2008.
Accepted on: 19 December 2008.
___________________Journal of Pain Research---DOVE MEDICAL PRESS LTD
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Submitted on: 27 March 1999.
Revised on: 25 July 1999.
Accepted on: 08 August 1999.
___________________Journal of Pain Research---DOVE MEDICAL PRESS LTD
Submitted on: 15 October 2007.
Revised on: 11 November 2007.
Accepted on: 02 December 2007.
___________________Journal of Pain Research---DOVE MEDICAL PRESS LTD
Submitted on: 20 May 2001.
Revised on: 12 June 2001.
Accepted on: 17 July 2001.
___________________Journal of Pain Research---DOVE MEDICAL PRESS LTD
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Submitted on: 04 October 2020.
Revised on: 01 December 2020.
Accepted on: 14 December 2020.
___________________Journal of Pain Research---DOVE MEDICAL PRESS LTD
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