Submitted on: 21 January 2001.
Revised on: 28 April 2001.
Accepted on: 15 June 2001.
___________________Archives of Disease in Childhood-Fetal and Neonatal Edition
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Submitted on: 19 May 2012.
Revised on: 10 September 2012.
Accepted on: 01 November 2012.
___________________Archives of Disease in Childhood-Fetal and Neonatal Edition
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Submitted on: 27 July 2024.
Revised on: 06 November 2024.
Accepted on: 17 November 2024.
___________________Archives of Disease in Childhood-Fetal and Neonatal Edition
Submitted on: 25 March 2023.
Revised on: 25 June 2023.
Accepted on: 13 August 2023.
___________________Archives of Disease in Childhood-Fetal and Neonatal Edition
Submitted on: 04 August 2014.
Revised on: 08 September 2014.
Accepted on: 16 October 2014.
___________________Archives of Disease in Childhood-Fetal and Neonatal Edition
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