1. Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Kawasaki 214-8571, Japan
2. Research Fellow of the Japan Society for the Promotion of Science, Japan
3. Meiji University International Institute for Bio-Resource Research, Kawasaki 214-8571, Japan
4. Present: Japan Science and Technology Agency, ERATO, Nakauchi Stem Cell and Organ Regeneration Project, Tokyo 102-0075, Japan
5. Research & Development Institute for Artificial Organs, Research & Development Laboratory, Nipro Corporation, Shiga 525-0055, Japan
6. Tokyo Development Foundation for Agriculture, Forestry and Fisheries, Tokyo 198-0024, Japan
7. Department of Animal and Grassland Research, National Agricultural Research Center for Kyushu Okinawa Region (KONARC), Kumamoto 861-1192, Japan