1. Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
2. Department of Surgery, Okayama Saidaiji Hospital, Okayama, Japan
3. Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University, Niigata, Japan
4. Department of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
5. Division of Morphological Pathology, Department of Basic Laboratory Sciences, School of Health Sciences, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan