1. Department of Plastic and Reconstructive Surgery, Faculty of Medicine/Graduate School of Medicine, Kagawa University, Kagawa, Japan;
2. Department of Plastic and Reconstructive Surgery, Faculty of Medicine/Graduate School of Medicine, Kindai University, Osaka, Japan;
3. Department of Plastic and Reconstructive Surgery, Faculty of Medicine/Graduate School of Medicine, Kochi University, Kochi, Japan;
4. Department of Plastic and Reconstructive Surgery, Faculty of Medicine, Keio University, Tokyo, Japan;
5. Department of Mechanical Engineering, Keio University, Tokyo, Japan