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Submitted on: 15 May 2002.
Revised on: 27 June 2002.
Accepted on: 24 July 2002.
___________________Academic Pediatrics---ELSEVIER SCIENCE INC
Submitted on: 21 April 2010.
Revised on: 29 June 2010.
Accepted on: 17 August 2010.
___________________Academic Pediatrics---ELSEVIER SCIENCE INC
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Submitted on: 20 July 2023.
Revised on: 10 November 2023.
Accepted on: 30 December 2023.
___________________Academic Pediatrics---ELSEVIER SCIENCE INC
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