1. a Center for Engineering in Medicine and Surgical Services, Massachusetts General Hospital, Shriners Burns Institute, and Harvard Medical School, Boston, MA 02114, USA
2. b Center for Engineering in Medicine and Surgical Services, Massachusetts General Hospital, Shriners Burns Institute, and Harvard Medical School, Boston, MA 02114, USA
3. c Center for Engineering in Medicine and Surgical Services, Massachusetts General Hospital, Shriners Burns Institute, and Harvard Medical School, Boston, MA 02114, USA
4. d Center for Engineering in Medicine and Surgical Services, Massachusetts General Hospital, Shriners Burns Institute, and Harvard Medical School, Boston, MA 02114, USA