http://reply.papertrans.cn/2/164/16350/16350-31.png
Submitted on: 31 August 1999.
Revised on: 26 December 1999.
Accepted on: 03 February 2000.
___________________JOURNAL OF DRUG EDUCATION---SAGE PUBLICATIONS INC
http://reply.papertrans.cn/2/164/16350/16350-33.png
http://reply.papertrans.cn/2/164/16350/16350-34.png
http://reply.papertrans.cn/2/164/16350/16350-35.png
Submitted on: 04 March 2003.
Revised on: 01 May 2003.
Accepted on: 13 June 2003.
___________________JOURNAL OF DRUG EDUCATION---SAGE PUBLICATIONS INC