1 Department of Plastic and Reconstructive Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan.
2 Department of Plastic and Reconstructive Surgery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan. Electronic address: tyamamoto-tky@umin.ac.jp.