1. Department of Anatomy, Faculty of Veterinary Medicine, Gadjah Mada University, Yogyakarta 55281, Indonesia
2. Laboratory of Anatomy, Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan
3. United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan
4. Department of Biology, Faculty of Mathematics and Natural Sciences, Lambung Mangkurat University, South Kalimantan, 70714, Indonesia
5. Department of Internal Medicine, Faculty of Veterinary Medicine, Gadjah Mada University, Yogyakarta 55281, Indonesia