Submitted on: 14 May 2001.
Revised on: 08 July 2001.
Accepted on: 22 August 2001.
___________________Journal of the Pediatric Infectious Diseases Society
http://reply.papertrans.cn/2/199/19829/19829-32.png
Submitted on: 13 December 2003.
Revised on: 05 March 2004.
Accepted on: 06 April 2004.
___________________Journal of the Pediatric Infectious Diseases Society
http://reply.papertrans.cn/2/199/19829/19829-34.png
Submitted on: 05 January 2016.
Revised on: 27 February 2016.
Accepted on: 11 March 2016.
___________________Journal of the Pediatric Infectious Diseases Society
Submitted on: 02 April 2001.
Revised on: 20 July 2001.
Accepted on: 12 August 2001.
___________________Journal of the Pediatric Infectious Diseases Society