1. Laboratory of Developmental Biology, Department of Life Science; Kinki University; Osaka; 577-8502; Japan
2. Laboratory of Animal Genetics, Department of Life Science; Kinki University; Osaka; 577-8502; Japan
3. Laboratory of Pathology; Food and Drug Safety Center; Kanagawa; 257-8523; Japan
4. Division of Cell Biology and Neuroscience, Faculty of Medical Sciences; University of Fukui; Fukui; 910-1193; Japan