1. Population Genetics Laboratory, National Institute of Genetics, Mishima
2. Department of Genetics, School of Life Science, Graduate University for Advanced Studies (SOKENDAI), Mishima
3. Genome Medical Science Project, National Center for Global Health and Medicine, Tokyo
4. Faculty of Medicine, University of The Ryukyus, Nishihara
5. Department of Biological Sciences, Graduate School of Science, the University of Tokyo, Tokyo