Submitted on: 14 May 1999.
Revised on: 10 July 1999.
Accepted on: 24 July 1999.
___________________JNP- The Journal for Nurse Practitioners
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Submitted on: 21 September 2000.
Revised on: 16 December 2000.
Accepted on: 29 December 2000.
___________________JNP- The Journal for Nurse Practitioners
Submitted on: 19 May 2009.
Revised on: 12 June 2009.
Accepted on: 22 June 2009.
___________________JNP- The Journal for Nurse Practitioners
Submitted on: 18 January 2018.
Revised on: 03 March 2018.
Accepted on: 26 April 2018.
___________________JNP- The Journal for Nurse Practitioners
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