http://reply.papertrans.cn/1/19/1802/1802-31.png
Submitted on: 23 May 2002.
Revised on: 10 July 2002.
Accepted on: 05 August 2002.
___________________Annals of Hepatology---ELSEVIER ESPANA
http://reply.papertrans.cn/1/19/1802/1802-33.png
Submitted on: 20 March 2003.
Revised on: 29 June 2003.
Accepted on: 08 August 2003.
___________________Annals of Hepatology---ELSEVIER ESPANA
http://reply.papertrans.cn/1/19/1802/1802-35.png
Submitted on: 19 April 2004.
Revised on: 10 May 2004.
Accepted on: 03 June 2004.
___________________Annals of Hepatology---ELSEVIER ESPANA