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Submitted on: 25 April 2003.
Revised on: 18 May 2003.
Accepted on: 05 June 2003.
___________________Journal of Pediatric Research---GALENOS PUBL HOUSE
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http://reply.papertrans.cn/2/187/18634/18634-34.png
Submitted on: 10 February 2003.
Revised on: 12 March 2003.
Accepted on: 28 March 2003.
___________________Journal of Pediatric Research---GALENOS PUBL HOUSE
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