Submitted on: 05 August 2003.
Revised on: 07 September 2003.
Accepted on: 02 October 2003.
Thai Journal of Veterinary Medicine
http://reply.papertrans.cn/3/294/29350/29350-12.png
http://reply.papertrans.cn/3/294/29350/29350-13.png
Submitted on: 22 September 2007.
Revised on: 31 October 2007.
Accepted on: 09 November 2007.
Thai Journal of Veterinary Medicine
http://reply.papertrans.cn/3/294/29350/29350-15.png
Submitted on: 21 September 2009.
Revised on: 22 October 2009.
Accepted on: 27 October 2009.
Thai Journal of Veterinary Medicine
http://reply.papertrans.cn/3/294/29350/29350-17.png
Submitted on: 14 April 2004.
Revised on: 17 May 2004.
Accepted on: 06 June 2004.
Thai Journal of Veterinary Medicine
http://reply.papertrans.cn/3/294/29350/29350-19.png
http://reply.papertrans.cn/3/294/29350/29350-20.png