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Submitted on: 02 November 1998.
Revised on: 09 February 1999.
Accepted on: 06 March 1999.
___________________Acta Paulista de Enfermagem---UNIV FED SAO PAULO, DEPT ENFERMAGEN
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Submitted on: 26 May 2005.
Revised on: 24 July 2005.
Accepted on: 06 August 2005.
___________________Acta Paulista de Enfermagem---UNIV FED SAO PAULO, DEPT ENFERMAGEN
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Submitted on: 06 March 2012.
Revised on: 03 July 2012.
Accepted on: 06 August 2012.
___________________Acta Paulista de Enfermagem---UNIV FED SAO PAULO, DEPT ENFERMAGEN
Submitted on: 28 April 2010.
Revised on: 23 August 2010.
Accepted on: 11 September 2010.
___________________Acta Paulista de Enfermagem---UNIV FED SAO PAULO, DEPT ENFERMAGEN