Submitted on: 27 February 2018.
Revised on: 30 May 2018.
Accepted on: 16 June 2018.
___________________JAMA Pediatrics---AMER MEDICAL ASSOC
Submitted on: 24 June 2019.
Revised on: 17 July 2019.
Accepted on: 28 July 2019.
___________________JAMA Pediatrics---AMER MEDICAL ASSOC
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Submitted on: 07 August 1999.
Revised on: 26 September 1999.
Accepted on: 27 October 1999.
___________________JAMA Pediatrics---AMER MEDICAL ASSOC
Submitted on: 07 April 2016.
Revised on: 13 June 2016.
Accepted on: 26 June 2016.
___________________JAMA Pediatrics---AMER MEDICAL ASSOC
http://reply.papertrans.cn/2/149/14808/14808-16.png
http://reply.papertrans.cn/2/149/14808/14808-17.png
Submitted on: 04 April 2007.
Revised on: 15 May 2007.
Accepted on: 05 July 2007.
___________________JAMA Pediatrics---AMER MEDICAL ASSOC
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http://reply.papertrans.cn/2/149/14808/14808-20.png