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Submitted on: 13 July 2000.
Revised on: 16 September 2000.
Accepted on: 20 October 2000.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS
Submitted on: 07 July 2008.
Revised on: 31 October 2008.
Accepted on: 03 December 2008.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS
Submitted on: 25 April 2014.
Revised on: 12 August 2014.
Accepted on: 03 October 2014.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS
Submitted on: 24 September 2013.
Revised on: 31 December 2013.
Accepted on: 14 January 2014.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS
Submitted on: 20 May 2018.
Revised on: 23 July 2018.
Accepted on: 19 August 2018.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS