1. Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, University of the Ryukyus, Nishihara 903-0215, Japan
2. Department of Orthopedic Surgery, Graduate School of Medicine, University of the Ryukyus, Nishihara 903-0215, Japan
3. Department of Plastic and Reconstructive Surgery, School of Medicine, Fujita Health University, Toyoake 470-1192, Japan
4. Center for Advanced Medical Research, School of Medicine, University of the Ryukyus, Nishihara 903-0215, Japan