1. Department of Veterinary Reproduction, Faculty of Veterinary Medicine, Airlangga University, Campus C Universitas Airlangga, Jl. Mulyorejo-Surabaya, Indonesia
2. Laboratory of Clinical Pathology, Joint Faculty of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
3. Laboratory of Theriogenology, Joint Faculty of Veterinary Medicine, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8511, Japan