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Chalika Wangdee, DVM, MSc., PhD, Department of Veterinary Surgery, Faculty of Veterinary
Science, Chulalongkorn University, 39 Henri Dunant Road, Bangkok 10330, Thailand,
Phone: +66 2218 9639, Fax: +66 2252 7007, E-mail: c.wangdee@hotmail.com; chalika.w@chula.ac.th.