J O U R N A L O F Veterinary Science pISSN 1229-845X, eISSN 1976-555X J. Vet. Sci. (2014), 15(4), 495-502 http://dx.doi.org/10.4142/jvs.2014.15.4.495 Received: 19 Feb. 2014, Revised: 22 May 2014, Accepted: 18 Jul. 2014 Original Article *Corresponding author: Tel: +82-33-250-8655; Fax: +82-33-259-5625; E-mail: