1. Department of Pharmacology, Faculty of Veterinary Medicine Kasetsart University Bangkok Thailand
2. Wongveerakit Crocodile Farm Kanchanaburi Thailand
3. Department of Physiology, Faculty of Veterinary Science Chulalongkorn University Bangkok Thailand
4. Department of Veterinary Sciences, University of Pisa Via Livornese (latomonte) San Piero a Grado Italy