Submitted on: 08 October 1999.
Revised on: 07 December 1999.
Accepted on: 05 January 2000.
___________________African Journal of Laboratory Medicine
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Submitted on: 01 February 2012.
Revised on: 09 March 2012.
Accepted on: 20 March 2012.
___________________African Journal of Laboratory Medicine
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Submitted on: 25 September 2011.
Revised on: 30 October 2011.
Accepted on: 27 December 2011.
___________________African Journal of Laboratory Medicine
Submitted on: 26 July 2000.
Revised on: 28 August 2000.
Accepted on: 17 October 2000.
___________________African Journal of Laboratory Medicine
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Submitted on: 17 February 2007.
Revised on: 13 June 2007.
Accepted on: 19 July 2007.
___________________African Journal of Laboratory Medicine
Submitted on: 15 March 1999.
Revised on: 07 June 1999.
Accepted on: 18 July 1999.
___________________African Journal of Laboratory Medicine
Submitted on: 25 June 2011.
Revised on: 23 September 2011.
Accepted on: 31 October 2011.
___________________African Journal of Laboratory Medicine