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Submitted on: 05 November 1999.
Revised on: 26 November 1999.
Accepted on: 20 January 2000.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS
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Submitted on: 10 January 2004.
Revised on: 03 May 2004.
Accepted on: 24 June 2004.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS
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Submitted on: 04 September 1999.
Revised on: 20 November 1999.
Accepted on: 16 January 2000.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS
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Submitted on: 23 December 2013.
Revised on: 08 April 2014.
Accepted on: 27 April 2014.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS
Submitted on: 18 April 2011.
Revised on: 07 June 2011.
Accepted on: 19 June 2011.
___________________CLINICAL JOURNAL OF PAIN---LIPPINCOTT WILLIAMS & WILKINS