Submitted on: 09 December 1998.
Revised on: 02 January 1999.
Accepted on: 19 January 1999.
___________________Biomedica---INST NACIONAL SALUD - COLOMBIA
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Submitted on: 07 October 2024.
Revised on: 03 January 2025.
Accepted on: 03 March 2025.
___________________Biomedica---INST NACIONAL SALUD - COLOMBIA
Submitted on: 28 July 2009.
Revised on: 22 September 2009.
Accepted on: 08 November 2009.
___________________Biomedica---INST NACIONAL SALUD - COLOMBIA