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Submitted on: 04 July 2009.
Revised on: 22 August 2009.
Accepted on: 25 September 2009.
___________________Hong Kong Journal of Paediatrics
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Submitted on: 20 November 2007.
Revised on: 18 January 2008.
Accepted on: 25 February 2008.
___________________Hong Kong Journal of Paediatrics
Submitted on: 29 July 2003.
Revised on: 03 November 2003.
Accepted on: 16 December 2003.
___________________Hong Kong Journal of Paediatrics
Submitted on: 07 July 2017.
Revised on: 12 October 2017.
Accepted on: 27 November 2017.
___________________Hong Kong Journal of Paediatrics
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