Submitted on: 17 October 1998.
Revised on: 03 November 1998.
Accepted on: 27 November 1998.
Presse Medicale---MASSON EDITEUR
http://reply.papertrans.cn/3/253/25207/25207-32.png
Submitted on: 17 July 2000.
Revised on: 04 August 2000.
Accepted on: 29 August 2000.
Presse Medicale
http://reply.papertrans.cn/3/253/25207/25207-34.png
http://reply.papertrans.cn/3/253/25207/25207-35.png
Submitted on: 29 March 2012.
Revised on: 12 April 2012.
Accepted on: 17 April 2012.
Presse Medicale---MASSON EDITEUR