Submitted on: 11 August 2015.
Revised on: 20 November 2015.
Accepted on: 02 January 2016.
___________________Acta Pediatrica de Mexico---INST NAC PEDIATRIA
Submitted on: 30 April 2008.
Revised on: 30 July 2008.
Accepted on: 29 August 2008.
___________________Acta Pediatrica de Mexico---INST NAC PEDIATRIA
Submitted on: 28 January 2000.
Revised on: 02 March 2000.
Accepted on: 29 April 2000.
___________________Acta Pediatrica de Mexico---INST NAC PEDIATRIA
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http://reply.papertrans.cn/1/5/435/435-15.png
Submitted on: 06 April 2020.
Revised on: 18 July 2020.
Accepted on: 07 September 2020.
___________________Acta Pediatrica de Mexico---INST NAC PEDIATRIA
http://reply.papertrans.cn/1/5/435/435-17.png
Submitted on: 02 August 2002.
Revised on: 24 August 2002.
Accepted on: 08 October 2002.
___________________Acta Pediatrica de Mexico---INST NAC PEDIATRIA
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Submitted on: 03 March 2013.
Revised on: 11 May 2013.
Accepted on: 11 June 2013.
___________________Acta Pediatrica de Mexico---INST NAC PEDIATRIA