Submitted on: 13 July 2001.
Revised on: 23 August 2001.
Accepted on: 10 September 2001.
Nigerian Postgraduate Medical Journal
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Submitted on: 22 September 2010.
Revised on: 15 October 2010.
Accepted on: 10 November 2010.
Nigerian Postgraduate Medical Journal
Submitted on: 31 May 2007.
Revised on: 15 June 2007.
Accepted on: 10 July 2007.
Nigerian Postgraduate Medical Journal
Submitted on: 15 January 2009.
Revised on: 12 February 2009.
Accepted on: 23 February 2009.
Nigerian Postgraduate Medical Journal
Submitted on: 04 September 2002.
Revised on: 30 September 2002.
Accepted on: 13 October 2002.
Nigerian Postgraduate Medical Journal
Submitted on: 01 October 2011.
Revised on: 14 November 2011.
Accepted on: 11 December 2011.
Nigerian Postgraduate Medical Journal
Submitted on: 14 May 2007.
Revised on: 31 May 2007.
Accepted on: 25 June 2007.
Nigerian Postgraduate Medical Journal
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