1. Division of Engineering in Medicine, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA.
2. Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, P. R. China.
3. Department of Surgery and the Heart and Vascular Center, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA.
4. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
5. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.