1. Division of Population Genetics, National Institute of Genetics, Mishima
2. Transdisciplinary Research Organization for Subtropics and Island Studies, University of the Ryukyus, Okinawa
3. Department of Human Biology and Anatomy, Faculty of Medicine, University of the Ryukyus, Okinawa
4. Department of Radiology, Faculty of Medicine, University of the Ryukyus, Okinawa