1. Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
2. 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