Submitted on: 14 August 1998.
Revised on: 29 August 1998.
Accepted on: 13 September 1998.
Revista Medica Clinica Las Condes
Submitted on: 23 October 2002.
Revised on: 07 November 2002.
Accepted on: 26 November 2002.
Revista Medica Clinica Las Condes
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Submitted on: 14 November 2011.
Revised on: 10 December 2011.
Accepted on: 20 December 2011.
Revista Medica Clinica Las Condes
Submitted on: 10 January 2000.
Revised on: 01 February 2000.
Accepted on: 16 February 2000.
Revista Medica Clinica Las Condes
Submitted on: 28 February 2013.
Revised on: 09 April 2013.
Accepted on: 22 April 2013.
Revista Medica Clinica Las Condes
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Submitted on: 30 August 2001.
Revised on: 02 October 2001.
Accepted on: 28 October 2001.
Revista Medica Clinica Las Condes
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