Document Type : Original Paper
Authors
1 Pyongyang University of Agriculture，Department of Veterinary Medicine and Animal Husbandry, Pyongyang 999093, DPR of Korea
2 Bioengineering Branch, State Academy of Sciences，Pyongyang 999093, DPR of Korea
3 Kye Ung Sang Sariwon University of Agriculture, Department of Veterinary Medicine and Animal Husbandry, Sariwon, 950003, DPR of Korea
Keywords
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