1 Plastic Surgery Hospital (Institute), Chinese Academy of Medical Sciences, Peking Union Medical College, No. 33 Badachu Road, Shijingshan District, Beijing, 100144, China.
2 Plastic Surgery Hospital (Institute), Chinese Academy of Medical Sciences, Peking Union Medical College, No. 33 Badachu Road, Shijingshan District, Beijing, 100144, China. liuchunjun@psh.pumc.edu.cn.