1. Biosciences Section, Faculty of Veterinary and Agricultural Sciences; The Univ. of Melbourne; Victoria 3010 Australia
2. Dept. of Food Science and Technology, Faculty of Agriculture; Univ. of Peradeniya, Peradeniya; Sri Lanka
3. Dept. of Animal Science, Faculty of Agriculture; Univ. of Peradeniya, Peradeniya; Sri Lanka