1. Department of Medical Cell Biology, Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto 860-0811, Japan
2. Department of Pediatrics, Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-0811, Japan
3. Division of Rheumatology, Center for Antibody and Vaccine Therapy, IMSUT Hospital, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
4. Liaison Laboratory Research Promotion Center, Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto 860-0811, Japan
5. Department of Developmental Biology, Graduate school of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan