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SRI U. HANDAJANI
Department of Veterinary Medicine, College of Agriculture, University of Osaka Prefecture, 4-804 Mozuumemachi, Sakai-shi, Osaka 591, JAPAN
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KAZUMI SASAI
Department of Veterinary Medicine, College of Agriculture, University of Osaka Prefecture, 4-804 Mozuumemachi, Sakai-shi, Osaka 591, JAPAN
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AKIRA ARAKAWA
Department of Veterinary Medicine, College of Agriculture, University of Osaka Prefecture, 4-804 Mozuumemachi, Sakai-shi, Osaka 591, JAPAN