1. Laboratory of Molecular Morphology, Department of Animal Science, Graduate School of Agricultural Science; Kobe University; Kobe Hyogo Japan
2. Laboratory of Histophysiology, Department of Animal Science, Graduate School of Agricultural Science; Kobe University; Kobe Hyogo Japan
3. Laboratory of Biology, Department of Mathematics and Natural Sciences, Graduate School of Teacher Education; Hyogo University of Teacher Education; Katoh Hyogo Japan